Question

a) 7x + 40 = 11 x + 60 - 2x
b) 25x - 17 = 10x + 28
c) 12x + 21 = 10x + 16
d) 9x - 8 = 5x + 20

Answer 1

Resposta:

Bom dia

A)7x+40=11x+60-2x

11x - 2x - 7x = 40 - 60

11x - 9x = - 20

2x = - 20

x = -20/2

x = -10 

B)25x - 10x = 28 + 17

15x = 45

x = 45 : 15

x = 3

C)12x-10x=16-21

2x=-5

x=-5/2

x=-2,5

D)9x-8=5x+20

9x-5x=20+8

4x=28

x=28/4

x=7

Espero ter ajudado, Bons estudos