Question

a)3x/2 = 9

b) x/2+2=x-8

c)2x-3x+5=x-7

d)5x+3=12+2x​

Answer 1

OI....

a)

3x/2 = 9 ⇒ mmc =2

3x = 18

x = 18/3

x = 6

b)

x/2 + 2 = x - 8 ⇒mmc = 2

x + 4 = 2x - 16

x - 2x = - 16 - 4

- x = - 20 ( - 1)

x = 20

c)

2x - 3x + 5 = x - 7

- x + 5 = x - 7

- x - x = - 7 - 5

- 2x = - 12 (- 1)

2x = 12

x = 12/2

x = 6

d)

5x + 3 = 12 + 2x

5x - 2x = 12 - 3

3x = 9

x = 9/3

x = 3

Espero ter ajudado.