Question

Resolva as equações abaixo:
a) x - 3 = 9

b) x + 5 = 20 - 4x

c) 3x - x = 8

d) 18x - 43 = 65

Answer 1

a) x = 9 + 3 -> x = 12

b) 4x + x = 20 - 5

5x = 15

x = 3

c) 2x = 8 -> x = 4

d) 18x = 43 + 65

18x = 108

x = 6