Question

ПОМОГИТЕ РЕШИТЬ
методом СЛОЖЕНИЯ!​

Answer 1

$displaystyle tt left { {{3x+2y=8} atop {4x-y=7}: : : | cdot 2} right. : to : left { {{3x+2y=8} atop {8x-2y=14}} right. \\displaystyle tt 3x+8x=8+14\displaystyle tt 11x=22\displaystyle tt x=frac{22}{11}\displaystyle tt underline{bold{x=2}}\displaystyle tt 4cdot2-y=7\displaystyle tt 8-y=7\displaystyle tt -y=7-8\displaystyle tt -y=-1\displaystyle tt underline{bold{y=1}}\\displaystyle tt boxed{bold{(x; : y)=(2; : 1)}}$

Ответ: $displaystyle tt (2; : 1)$