Question

Alguém sabe a resposta? por favor 2x+3y=0 3x+5y=9

Answer 1

3x+5y=9
3x=9-5y
x=$\frac{9-5y}{3}$

2x+3y=0
2($\frac{9-5y}{3}$)+3y=0
2[($\frac{9}{3}$)-$\frac{5y}{3}$+3y=0
2(3-$\frac{5y}{3}$)+3y=0
6-$\frac{10y}{3}$+3y=0
-$\frac{10y}{3}$+3y=-6
-$\frac{10y}{3}$+$\frac{9y}{3}$=-6
-$\frac{y}{3}$=-6
y=18

2x+3y=0
2x+3(18)=0
2x+54=0
2x=-54
x=-27