Question

Решите систему уравнений {8(2x+y)-2y=-76,
4(x-3y)+10y=-12.

Answer 1

$16 x + 8y - 2y = - 76 \\ 4x - 12y + 10y = - 12 \\ 16x + 6y = - 76 \\ 4x - 2y = - 12 |3 \\ 16x + 6y = - 76 \\ 12x - 6y = - 36 \\ 28x = - 112 \\ x = - 4 \\ y = - 2$