Question

Resolva: Pfvr me ajudem!!!

Answer 1

Resposta:

A) $\left \{ {{x +y=9} \atop {x - y=3}} \right.$

x = 6

y = 3

B) $\left \{ {{x +y=7} \atop {x - y=3}} \right.$

x = 5

y = 2

C) $\left \{ {{x +y=3} \atop {x - y=1}} \right.$

x = 2

x = 1

Espero ter ajudado!