Question

x - y + 5 = 0 x - y + 8 = 0

Answer 1

{x-y+5=0}

{0x-y+8=0}

{x-y=-5}

{y=8}

x=3

(x, y) = (3,8)

3-8+5=0×3-8+8=0

Si se simplifica da 0

0=0=0

(x,y) = (3,8)