Question

Quanto é:
A_ 3.(2x-1) = -2.(x+3)?
B_ 7.(x-2) = 5.(x+3)?
valendo 15 pontos

Answer 1

a)
3 (2x - 1) = - 2 (x + 3)
6x - 3 = - 2x - 6
6x + 2x = - 6 + 3
8x = - 3
x = - 3/8

b)
7 (x - 2) = 5 (x + 3)
7x - 14 = 5x + 15
7x - 5x = 15 + 14
2x = 29
x = 29/2


Espero ter ajudado, bons estudos!