Question

{4х+8у=12
{32х-10у=70
Зделать через у.

Answer 1

$\displaystyle\bf\\\left \{ {{4x+8y=12} \ |\cdot(-8) \atop {32x-10y=70}} \right. \\\\\\+\left \{ {{-32x-64y=-96} \atop {32x-10y=70}} \right.\\------------\\-74y=-26\\\\y=\frac{13}{37} \\\\4x=12-8y=12-8\cdot\frac{13}{37} =12-2\frac{30}{37} =9\frac{7}{37} \\\\x=9\frac{7}{37} :4=\frac{340}{37} \cdot\frac{1}{4} =\frac{85}{37} =2\frac{11}{37} \\\\\\Otvet \ : \ \Big(2\frac{11}{37} \ ; \ \frac{13}{37} \Big)$

Answer 2

Ответ:



Пошаговое объяснение: