Question

6) Resolva as seguintes equações:

a) 3.(2x - 8) + 2.(4 - 5x) = 4.(5 + 2x) b) 4 ( x + 5 ) + 3( x + 5 ) = 21

Answer 1

Resposta:

a)

6x - 24 + 8 - 10x = 20 + 8x

6x - 10x - 8x = 20 +16

-12x = 36

x = 36/-12

x = -3