Question

помогите пжлста дам 25 баллов​

Answer 1

$\displaystyle\bf\left \{ {{8x-3y=2} \atop {-4x+2y=20}|\cdot 2} \right.\\\\\\+\left \{ {{8x-3y=2} \atop {-8x+4y=40}} \right. \\----------\\y=42\\\\8x=2+3y=2+3\cdot 42=2+126=128\\\\x=128:8\\\\x=16\\\\\left \{ {{x=16} \atop {y=42}} \right.$