Question

Решите систему уравнений.
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Answer 1

Ответ:

Объяснение:

$\large \boldsymbol {} \left \{ {\begin{array}{ccc} \displaystyle \ \frac{2}{3} x-\frac{4}{9}y=-6 \ \ |\cdot9 & \\\\\displaystyle -4x- \frac{2}{3}y =26 \ \ | \cdot 3 \\\end{array}\right =>\oplus\left \{ {\begin{array}{ccc} 6x-4y=-54 \ \ |\cdot 2 & \\\\ \!\!\!\!\!\!\!\!\ -12x-2y=78 \end{array}\right=> \\\\\\12x \!\!\!\!\!\Big/-12x \!\!\!\!\!\Big/ \ \ -8y-2y=-108+78 \\\\\\-10y=-30 \\\\\\y=3 \ \ ; \ \ x= \tfrac{78+2y}{-12} =-7 \\\\\\ Otvet : (-7 \ \ ; \ \ 3 )$