Question

Podem me ajudar por favor?!​

Answer 1

A) 7x+20=69

7x=69-20

7x=49

x=49:7

x=7

B) 3x-12=6

3x=6+12

3x=18

x=18:3

x=6

C) 2x-45=11

2x=11+45

2x=56

x=56:2

x=28

D) 4x+30=80

4x=80-30

4x=50

x=50:4

x=12,5

E) 5x+49=9

5x=9-49

5x=-40

x=-40:5

x=-8