Question

{6x-5y=-9
2x+3y=4
calcular x y

Answer 1

iguala las ecuaciones
18x -15y = -27
10x +15y = 20
Luego sumalas verticalmente
28x = -7 >>
x = -1/4
y = 3/2
Entonces xy = -1/4x3/2 = -3/8