Question

решить систему уравнений $\left \{ {{x-3y=5} \atop {y(x-3y)=15}} \right.$

Answer 1

$\left \{ {{x-3y=5} \atop {y(x-3y)=15}} \right.\\\\\left \{ {{x-3y=5} \atop {y*5=15}} \right.\\\\\left \{ {{y=3} \atop {x=5+3y}} \right.\\\\\left \{ {{y=3} \atop {x=5+3*3}} \right.\\\\\left \{ {{y=3} \atop {x=14}} \right.\\\\Otvet:\boxed{(14 \ ; \ 3)}$