Question

6) Resolva as equações abaixo: a) 3 + x = 0 b) 23x + 2 = 2 c) 12 - 7 + 4x = 25 d) 5x - 3x = 30 e) 4x + 10 = 45 -- 3x f) 5× - 11 = 109​

Answer 1

Resposta:

a) 3 + x = 0

x = 0 - 3

x= - 3

b) 23x + 2 = 2

23x = 2 - 2

23x = 0

x = 0 / 23

x = 0

c) 12 - 7 + 4x = 25

4x = 25 - 12 + 7

4x = 25 + 7 - 12

4x = 32 - 12

4x = 20

x = 20 / 4

x = 5

d) 5x - 3x = 30

2x = 30

x = 30 / 2

x = 15

e) 4x + 10 = 45 -- 3x

4x + 3x = 45 - 10

7x = 35

x = 35 / 7

x = 5

f) 5× - 11 = 109

5x = 109 + 11

5x = 120

x = 120 / 5

x = 24