Question

Resolva as equações:
a) x + 5 = 9
b) x – 4 = 5
c) 5 z = – 30
d) 4 y + 16 = 4
e) 4 x – 2 = x + 10
f) 4 . (x + 3) = 2 . (12 – x)

Answer 1

Resposta:

a) x = 4

b) x = 9

c) z = -6

d) y = -3

e) x = 4

f) x = 2

Explicação passo-a-passo:

a) x + 5 = 9

x = 9 - 5

x = 4

b) x - 4 = 5

x = 5 + 4

x = 9

c) 5z = -30

z = -30/5

z = -6

d) 4y + 16 = 4

4y = 4 - 16

4y = -12

y = -12/4

y = -3

e) 4x - 2 = x + 10

4x - x = 10 + 2

3x = 12

x = 12/3

x = 4

f) 4.(x+3) = 2.(12-x)

4x + 12 = 24 - 2x

4x + 2x = 24 - 12

6x = 12

x = 12/6

x = 2