Question

alguém consegui responder essas questões?

Answer 1

1° a) 3x-7 = 2x +5

3x-2x=5+7

x=12

b) 7x + 8 = 4x - 10

7x - 4x = - 10 -8

3x= -18

x= -18/3

x= -6

c) 4x - 15  = -2x + 3

4x+2x=3 + 15

6x = 18

x= 18/6

x=3

d) 2x-4-8 = 4x

2x-4x=12

-2x=12

x= 12/-2

x= -6

e)3x = x+1+7

2x=8

x=8/2

x=4

f)360+36x + 30x

360=36x

x=360/36

x=10

g) 84=6x

x=84/6

x=14