Question

Решите систему уравнений $\left \{ {{26x-15y=-45} \atop {21x+2y=6}} \right.$

Answer 1

$\left \{ {{26x-15y=-45} \atop {21x+2y=6}|*7,5} \right.\\\\+\left \{ {{26x-15y=-45} \atop {157,5x+15y=45}} \right.\\ --------\\183,5x=0\\\\x=0\\\\2y=6-21x=6-21*0=6\\\\y=3\\\\Otvet:\boxed{(0;3)}$