Question

8)Resolva as equações: a)9x = 81 b) x – 4 = 14 c)3x + 5 = 20 d)4x – 5 = 13 + x e) 5(x + 12) = x f) 4(x – 1) = 2(x – 4) *

Answer 1

Resposta:

a) 9x = 81

x = 81/9

x = 9

b) x - 4 = 14

x = 14 + 4

x = 18

c) ---

3x = 20 - 5

x = 15/3

x = 5

d) ---

4x = 13 +x + 5

3x = 18

x = 6

e) ---

5x + 60 = x

4x = -60

x = -60/4

x = -15

f) ---

4x - 4 = 2x - 8

2x = -4

x = -4/2

x = -2