Unit 1 Solving & Creating Equations Review

the inverse operation of addition is subtraction

+ 2.5 on both sides

-2.5 on both sides

A = 21.1

Check your answer by replacing the variable with its value

First step: +26 on both sides

First step: -4 on both sides

Second step: +26 on both sides

Second step: -5 on both sides

Second step: divide by 5 on both sides

I can use distribution

I can combine like-terms

-28 and +8 can be combined

2a and -5a can be combined

-28 = -3a + 8

+4 on both sides

-5 on both sides

+2x on both sides

-x on both sides

-2 on both sides

-9 on both sides

-8a on both sides

+8a on both sides

-3a on both sides

divide by 4 on each side then +b

+b on both sides, then divide by 4

-m on each side, then divide by 4

-4r on each side, then +b

p = 2 + l + w

p = 2 x l + w

p = 2 x (L + W)