Question

urgente!!!
X+ y = 6
x- y = -2​

Answer 1

resolução!

x + y = 6

x - y = - 2

2x = 4

x = 4/2

x = 2

y = 6 - x

y = 6 - 2

y = 4

S = { X = 2 e Y = 4 }