Question

{x-3=-y} {3x-2=y-3} sistema de substituiçao

Answer 1

x = -y + 3

3(-y +3) -2 = y-3
-3y +9 -2 = y -3 
-3y -y = -9 +2 -3 (.-1)
4y = 10
y = 10/4

x = -10/4 + 3
x = -10 + 12/4
x = 2/4
x = 1/2
x = 0,5