Question

Usando a regra de cramar resolva o sistema
X+4y=0
3x+2y=-3

Answer 1

{x+4y=0
{3x+2y= -3

x+4y=0
x= -4y

3x+2y= -3
3.(-4y)+2y= -3
-12y+2y= -3
-10y =-3
y= -3/10

x= -4y
x= -4.(-3)/10
x= 12/10