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smailovasamira3
@smailovasamira3
August 2022
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Помогите срочнооо!!!! Решите систему уравнений методом подстановки:
X-y=7
5x-3y=1
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barinvlad26031
Х-у=7
5х-3у=1
х=7+у Тогда
5(7+у)-3у=1
5*7+5у-3у=1
35+2у=1
2у=1-35
2у=-34
у=-34/2
у=-17
х=7+(-17)=7-17=-10
-10-(-17)=-10+17=7
5*(-10)-3*(-17)=-50+51=1
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Answers & Comments
5х-3у=1
х=7+у Тогда
5(7+у)-3у=1
5*7+5у-3у=1
35+2у=1
2у=1-35
2у=-34
у=-34/2
у=-17
х=7+(-17)=7-17=-10
-10-(-17)=-10+17=7
5*(-10)-3*(-17)=-50+51=1