Question

{4x + 2y = - 2 2x + 3y = - 7 (com cálculo pfvr)

Answer 1

4x + 2y = - 2 ÷2
2x + 3y = - 7

2x+y=-2
2x+3y=-7


y=-2-2x
y=-2-2*(1/4)
y=-2-1/2
MMC de 2 e 1 = 2
y=-4/2-1/2
y=-5/2


2x+3*(-2-2x) = -7
2x+ (-6) -6x = -7
2x-6-6x=-7
2x-6x=-7+6
-4x=-1
x=-1/-4
x=1/4