Question

RESOLVA AS EQUAÇÕES DE 1º GRAU:
a) 4X + 7 - 3X = 4x + 7 - 6
b) 3(Y + 4) = 7Y - 2(y - 3)

Answer 1

Resposta:

$a) 4x + 7 - 3x = 4x + 7 - 6$

$4x-3x-4x=7+6-7$

$-3x=-6$

$x=6/3$

$x=2$

$b) 3(y + 4) = 7y - 2(y - 3)$

$3y+12=7y-2y+6$

$3y+12=5y+6$

$3y-5y=6-12$

$-2y=-6$

$x=6/2$

$x=3$