7th Grade Expressions and Equations

Distributing/Factoring

100

-3(2x+8)

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

200

18x-24

6(3x-4)

300

1/6(12x+30)

2x+5

400

-9a+45

-9(a-5) or 9(-a+5)

500

24x+48xy

24x(1+2y)

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= -3

a=-2

500

2/5x+12=2

x=-25

Two Step Equations with decimal answers

100

2x+9 = 16

x=3.5

200

4x -1.2=4.6

x=1.45

300

x/-6+10.4= -5.3

x=94.2

400

-5b+6 = -12

b=3.6

500

-9b+7 = 5.2

b=0.2