Verified answer

Vamos là.

a) 3(x-2) =(x-1)

3x - 6 = x - 1

3x - x = 6 - 1

2x = 5

x = 5/2

b) 7(x-4)=2x-3

7x - 28 = 2x - 3

7x - 2x = 28 - 3

5x = 25

x = 5

c) 3(2x-1)=-2 (x+3)

6x - 3 = -2x - 6

6x + 2x = 3 - 6

8x = -3

x = -3/8

d) 2x+3+9= 8 (6-x)​

2x + 12 = 48 - 8x

2x + 8x = 48 - 12

10x = 36

x = 36/10 = 18/5