Question

помогите пж даю 20 баллов​

Answer 1

$\displaystyle\bf\\\left \{ {{5(3x+y)-8(x-6y)=20} \atop {6(x-10y)-13(x-y)=52}} \right.\\\\\\\left \{ {{15x+5y-8x+48y=20} \atop {6x-60y-13x+13y=52}} \right. \\\\\\+\left \{ {{7x+53y=20} \atop {-7x-47y=52}} \right. \\-----------\\6y=72\\\\y=12\\\\7x=20-53y=20-53\cdot 12=20-636=-616\\\\x=-616:7=-88\\\\Otvet \ : \ \Big(-88 \ ; \ 12\Big)$

Answer 2

Відповідь:

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