Solving for x in Linear Equations

Oct 13, 2025 by wbrum.org 27 views

Introduction

In mathematics, solving for x is a fundamental concept that involves isolating the variable x in an equation. It is a crucial skill that is used in various mathematical operations, including algebra, geometry, and calculus. In this article, we will explore how to solve for x in linear equations, as well as provide solutions to two additional problems that involve mathematical calculations.

Solving for x in Linear Equations

A linear equation is an equation in which the highest power of the variable is 1. In other words, it is an equation that can be written in the form ax + b = c, where a, b, and c are constants. To solve for x in a linear equation, we need to isolate the variable x on one side of the equation.

Step 1: Subtract b from both sides of the equation

The first step in solving for x is to subtract b from both sides of the equation. This will help us to isolate the variable x.

Step 2: Divide both sides of the equation by a

Once we have subtracted b from both sides of the equation, we need to divide both sides of the equation by a. This will help us to isolate the variable x.

Example

Let's consider the following linear equation:

3x = 6x - 2

To solve for x, we need to follow the steps outlined above.

Step 1: Subtract b from both sides of the equation

Subtracting 2 from both sides of the equation, we get:

3x - 2 = 6x - 2 - 2

Simplifying the equation, we get:

3x - 2 = 6x - 4

Step 2: Add 2 to both sides of the equation

Adding 2 to both sides of the equation, we get:

3x = 6x - 4 + 2

Simplifying the equation, we get:

3x = 6x - 2

Step 3: Subtract 6x from both sides of the equation

Subtracting 6x from both sides of the equation, we get:

-3x = -2

Step 4: Divide both sides of the equation by -3

Dividing both sides of the equation by -3, we get:

x = 2/3

Therefore, the value of x is 2/3.

How Much Would You Pay for 80 Packs of Masks?

A pack of 100 masks costs $RJERqG. How much would you pay for 80 packs?

To solve this problem, we need to multiply the cost of one pack of masks by the number of packs we want to buy.

Step 1: Calculate the cost of one pack of masks

The cost of one pack of masks is $RJERqG.

Step 2: Multiply the cost of one pack of masks by the number of packs

Multiplying the cost of one pack of masks by the number of packs, we get:

$RJERqG x 80 = $RJERqG x 80

Simplifying the equation, we get:

$RJERqG x 80 = $RJERqG x 80

Therefore, the cost of 80 packs of masks is $RJERqG x 80.

If 250 Grams of Flour is Used to Make 10 Loaves of Bread, How Much Flour is Used to Make 1 Loaf of Bread?

If 250 grams of flour is used to make 10 loaves of bread, how much flour is used to make 1 loaf of bread?

To solve this problem, we need to divide the total amount of flour used by the number of loaves of bread.

Step 1: Calculate the total amount of flour used

The total amount of flour used is 250 grams.

Step 2: Divide the total amount of flour used by the number of loaves of bread

Dividing the total amount of flour used by the number of loaves of bread, we get:

250 grams ÷ 10 loaves = 25 grams per loaf

Therefore, 25 grams of flour is used to make 1 loaf of bread.

Conclusion

Q&A: Solving for x and Beyond

In this article, we will continue to explore the concept of solving for x in linear equations, as well as provide answers to some of the most frequently asked questions related to this topic.

Q: What is a linear equation?

A linear equation is an equation in which the highest power of the variable is 1. In other words, it is an equation that can be written in the form ax + b = c, where a, b, and c are constants.

Q: How do I solve for x in a linear equation?

To solve for x in a linear equation, you need to follow these steps:

Subtract b from both sides of the equation.
Divide both sides of the equation by a.

Q: What is the difference between a linear equation and a quadratic equation?

A linear equation is an equation in which the highest power of the variable is 1, while a quadratic equation is an equation in which the highest power of the variable is 2.

Q: How do I solve a quadratic equation?

To solve a quadratic equation, you need to follow these steps:

Factor the equation, if possible.
Use the quadratic formula to solve for x.

Q: What is the quadratic formula?

The quadratic formula is a formula that is used to solve quadratic equations. It is given by:

x = (-b ± √(b^2 - 4ac)) / 2a

Q: How do I calculate the cost of 80 packs of masks?

To calculate the cost of 80 packs of masks, you need to multiply the cost of one pack of masks by the number of packs.

Q: If 250 grams of flour is used to make 10 loaves of bread, how much flour is used to make 1 loaf of bread?

To calculate the amount of flour used to make 1 loaf of bread, you need to divide the total amount of flour used by the number of loaves of bread.

Q: What is the difference between a variable and a constant?

A variable is a value that can change, while a constant is a value that remains the same.

Q: How do I simplify an equation?

To simplify an equation, you need to combine like terms and eliminate any unnecessary variables.

Q: What is the order of operations?

The order of operations is a set of rules that dictate the order in which mathematical operations should be performed. The order of operations is:

Parentheses
Exponents
Multiplication and Division
Addition and Subtraction

Q: How do I graph a linear equation?

To graph a linear equation, you need to plot two points on a coordinate plane and draw a line through them.

Conclusion

In this article, we have provided answers to some of the most frequently asked questions related to solving for x in linear equations and beyond. We have also discussed the concept of linear equations, quadratic equations, and the order of operations. By following the steps outlined in this article, you should be able to solve for x in linear equations and calculate the cost of 80 packs of masks and how much flour is used to make 1 loaf of bread.

Additional Resources

For more information on solving for x in linear equations and beyond, please visit the following resources:

Khan Academy: Solving Linear Equations
Mathway: Solving Linear Equations
Wolfram Alpha: Solving Linear Equations

Final Thoughts

Solving for x in linear equations is a fundamental concept in mathematics that is used in various mathematical operations, including algebra, geometry, and calculus. By following the steps outlined in this article, you should be able to solve for x in linear equations and calculate the cost of 80 packs of masks and how much flour is used to make 1 loaf of bread. Remember to always follow the order of operations and simplify equations whenever possible.