Question

$\left \{ {{x+y=6} \atop {x-y=2}} \right.$ quanto vale x? e y?

Answer 1

Resposta:

x = 4, y = 2

Explicação passo-a-passo:

$\left \{ {{x+y=6} \atop {x-y=2}} \right.$

x+y+y-y=6+2

2x = 8

x = 4

4 + y = 6

y = 2