Question

a) 2(x + 2) = 2(x - 2) + x

b) 2(x + 2) = 4

c) 2x = 2(x + 2)

d) 2(x + 2) + 4 = 5x + 8 - 3x

Answer 1

Resposta:

Explicação passo-a-passo:

A) 2(x + 2) = 2(x - 2) + x

2x+4 = 2x-4 + x

2x+4 = 3x-4

4+4= 3x-2x

8 = x

x = 8

_________

b) 2(x + 2) = 4

2x+4= 4

2x = 4-4

2x = 0

x = 0/2

x = 0

_______

c) 2x = 2(x + 2)

2x = 2x + 4

2x-2x = 4

0 = 4 (impossível resolver)

_______

d) 2(x + 2) + 4 = 5x + 8 - 3x

2x+4 + 4 = 2x+8

2x+8 = 2x+8

2x-2x = 8-8

0= 0 (impossível resolver)