Question

-3x-2y=8

x-5y=3

qual valor de x e y?

Answer 1

-3x-2y=8
x-5y=3 -> x=3+5y

-3x-2y=8
-3(3+5y)-2y=8
-9-15y-2y=8
-15y-2y=8+9
-17y=17 *(-1)
17y=-17
y=-17/17
y=-1

x-5y=3
x-5(-1)=3
x+5=3
x=3-5
x=-2