Question

Решите систему уравнений способом подставления {10p+7q=-2 {2p-22=5q

Answer 1

$\left \{ {{10p+7q=-2} \atop {2p=5q+22}} \right. ; \left \{ {{5*(5q+22)=-2-7q} \atop {2p=5q+22}} \right. ; \left \{ {{25q+110=-2-7q} \atop {2p=5q+22}} \right. ; \left \{ {{25q+7q=-2-110} \atop {2p=5q+22}} \right.$ ; $\left \{ {{32q=-112} \atop {2p=5q+22}} \right. ; \left \{ {q=-3.5} \atop {2p=5q+22}} \right. ; \left \{ {q=-3.5} \atop {2p=5(-3.5)+22}} \right. ; \left \{ {q=-3.5} \atop {2p=-17.5+22}} \right. ; \left \{ {q=-3.5} \atop {p= \frac{4.5}{2} }} \right.$ ; $\left \{ {q=-3.5} \atop{p=2.25}} \right.$