Question

Resolva as equações
a) 5 + 7x = -9
b) -9x – 7 = -5x + 13
c) 6 + 2x = 12

Answer 1

→ Cálculo :

A) 5 + 7x = -9

7x = - 9 - 5

7x = -14

x = -14 ÷ 7

x = -2

B) - 9x - 7 = - 5x + 13

-9x + 5x = 13 + 7

-4x = 20

x = -20 ÷ 4

x = -5

C) 6 + 2x = 12

2x = 12 - 6

2x = 6

x = 6 ÷ 2

x = 3