7th Grade Expressions, Equations and Inequalities

Distributive Property

100

-3(2x+8)

-6x+(-24) or -6x-24

200

6(3x-4)

18x-24

300

-9(a-5)

-9a+45

400

1/6(12x+30)

2x+5

500

3x(2x+2)

6x²+6x

Combing Like Terms

100

14x - 19 + 23x – 15

37x-34

200

-5xy - 12x - 7xy +11y

-12xy-12x+11y

300

11x + 7 + 13x - 22x

-2x+7 or 7-2x

400

-3.8x - 9 + 2.4x

-1.4x - 9

500

( 6x + 9 ) + 3( 10x + 15 )

36x+54

One Step Equations

100

7x=49

x=7

200

x-14= -9

x=5

300

x/6=12

x=72

400

6.7+x=10

x=3.3

500

1/7x=5

x=35

Two Step Equations

100

x/3 + 5 = 10

x=15

200

-13 + 5x= 7

x=4

300

-7x- 11= 17

x=-4

400

4a +5.6= -2.8

a=-2.1

500

2/5x+12=2

x=-25

Inequalities

100

x+9 < 16

x<7

200

8x ≥ 32

x ≥ 4

300

x/-6< -5

x>30

400

5b+8 > -12

b>-4

500

-9b+7 < 52

b>-5