Question

x+y=4 e x-y=6 pfvr me ajude ​

Answer 1

$x = 4 - y \\ 4 - y - y = 6 \\ - 2y = 2 \\ y = \frac{2}{ - 2} = - 1 \\ x = 4 - ( - 1) \\ x = 5$