Math 7 Two-Step Equations

Multiplication & Addition

100

2k + 5 = 17

x= 6 

200

2a + 11 = 35

x= 12

300

2r + 39 = 65

x=13 

400

12s + 27 = 171

x=12

500

19b + 314 = 1663

x=71

Multiplication & Subtraction

100

3a - 5 = 4

a=3

200

5m - 7 = 23

m=6

300

6k - 5 = 43

k=8

400

4j - 71 = 29

j=25

500

21q - 39 = 234

q=13

With parentheses

100

20(x+9)=140

x=61

200

7(x-3)=-28

x=-1

300

12(x-20) = -36

x=16

400

2/5(x - 3)= 8

x=23

500

5/9(x+8)=-20

x=-44

Rational coefficients & Addition

100

m/5 + 4 = 12

m=40

200

y/8 + 15 = 13

y=-16

300

2/3 k + 5 = 9

k=6

400

11/12 b +25 = 47

b=24

500

15 - 1/2 b = -3

b = 36

Rational coefficients & Subtraction

100

z/6 - 8 = 2

What is 60?

200

y/9 - 15 = 5

What is 180 ?

300

1/7 b - 5 = -2

b = 21

400

2/3 n - 1 = 7

n=12

500

-4/5 d -2 = 14

d=-20