# Solving equations using subtraction

When solving equations using subtraction, they will have the form  x + b = c. Recall that ax + b = c is a linear equation.

Therefore, the equation x + b = c is a linear equation with a = 1.

To see this, notice that 1.x = x

Thus, we can rewrite x + b = c as

1.x + b = c

You can solve x + b = c in one step.

When solving one step equation of the form x + b = c, subtract b from both sides of the equation.

Let us illustrate with examples:

Example #1

Solve x + 3 = 8 for x Alternatively, you do not have to put the -3 beneath the 3. You can also put it next to it.

x + 3 = 8

x + 3 − 3 = 8 − 3

x + 0 = 5

x = 5

Example #2

Solve x + 5 = 10 for x Example #3

Solve x + 5 = - 10 for x You could also solve the equation x + 5 = -10 as shown below

x + 5 = -10
x + 5 - 5 = -10 - 5
x + 0 = -15
x = -15

## Solving equations using subtraction. Can you get 100% on this quiz?

Realated content

Easily solve equations of the form x + b = c with the click of a button!

## Recent Articles 1. ### How to Write an Inequality

Dec 12, 19 07:51 AM

Learn how to write an inequality quickly with this easy to follow math lesson.

New math lessons

Your email is safe with us. We will only use it to inform you about new math lessons.

Tough Algebra Word Problems.

If you can solve these problems with no help, you must be a genius! Real Life Math Skills

Learn about investing money, budgeting your money, paying taxes, mortgage loans, and even the math involved in playing baseball.