Question

d) x – 23 + 12x = 7x – 21 + 32 e) -5x + 20 -11x = -23 + 2x – 4 f) 15x – 12 + 16 = - 7x + 8x – 23 + 15

Answer 1

Resposta:

d) x - 23 +12x = 7x -21 +32

x+12x -7x = -21 +32 +23

13x -7x = -21 + 55

+6x = +34

x= 34/6 ( simplificar por 2)

x= 17/3

e)-5x +20 - 11x= -23+2x -4

-5x -11x -2x= -23 -4 - 20

-18x= - 47 (-1)

+18x = +47

x = 47/18

f) 15x-12+16=-7x+8x-23+15

15x +7x-8x= -23 +15 +12 -16

22x -8x = -38 + 27

+14x = - 11

x= -11/14

espero ter ajudado!