September 2021 0 3 Report
41. Умножьте одно из уравнений системы на -1 и решите систе- x+2y =18,
x+3y = -2;/*(-1)
му способом сложения:
(x+2y = 18,
а)
[x - 3y = -2; |-(-1)
5y=20,
|x+2y = 18;
Ответ: ( ; ).
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