Question

поможите... пжпжпжпжпжпжжпжм​

Answer 1

$\left \{ {{x+4y=15} \atop {5x-4y=27}} \right. \\6x=42\\x=7;\\4y=15-x; y=\frac{15-x}{4}\\y=\frac{15-7}{4}=2$

Ответ: (7 ; 2)