Question

Решите систему способом сложения

Answer 1

$\displaystyle\bf\\\left \{ {{2x+y=6} \ |\cdot 2 \atop {-4x+3y=8}} \right. \\\\\\+\left \{ {{4x+2y=12} \atop {-4x+3y=8}} \right. \\----------\\5y=20\\\\y=20:5=4\\\\2x=6-y=6-4=2\\\\x=2:2=1\\\\Otvet: \ \Big(1 \ ; \ 4\Big)$