Question

Como resolver esse sistema?​

Answer 1

Resposta:

X= 2

Y= 5

Explicação passo-a-passo:

$\left \{ {{x+y=7} \atop {2x-2y=-6}} \right. \\\left \{ {{x+y=7 (*2)} \atop {2x-2y=-6}} \right. \\\left \{ {{2x+2y=14} \atop {2x-2y=-6}} \right. \\4x=8\\x=2\\\\x+y=7\\2+y=7\\y=5$