Question

решите систему уравнений x-3y=5. 2y-x=-7

Answer 1

$left { {{x-3y=5}, atop {2y-x=-7};} right. left { {{y=2}, atop {4-x=-7};} right. left { {{y=2},atop {x=11};} right.$
Ответ:(11;2)