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тупой192
@тупой192
July 2022
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решить системы уравнеии 3x+2y=7 x-5y=-9
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rubilovalex
X=5y-9. подставляем в 1 уравнение: 3*(5y-9)+2y=7; 15y+2y-27=7; 15y+2y=7+27; 17y=34; y=34/17=2. x=5*2-9=10-9=1. Ответ: (1:2).
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