Question

Resposta dos itens. Com calculos

Answer 1

Resposta: A) x = 7, B) x = -5, C) x = 7, D) x = -2,5

Explicação passo-a-passo:

A) 11x -13 = 64

11x = 64 +13

11x = 77

x = 77/11

x = 7

b) 17x +50 = 7x

17x -7x = -50

10x = -50

x = -50/10

x = -5

C) 13x -12 = 9x +16

13x -9x = 16 +12

4x = 28

x = 28/4

x = 7

D) 12x +21 = 10x +16

12x -10x = +16 -21

2x = -5

x = -5/2

x = -2,5