Найдите решение уравнений способом подстановки
1){3(X+2Y)-y=27
_{4(X+Y)-3X=23
2){2x+3(x+y)=11
_-{7(x3y)-6x=-59
1){3(X+2Y)-y=27
_{4(X+Y)-3X=23
2){2x+3(x+y)=11
_-{7(x3y)-6x=-59
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