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ari6ka12
@ari6ka12
August 2021
1
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Решите систему уравнений способом сложения:
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maurer22
1) тут методом вычитания
7х+2у-5х-2у=9-11
2х=-2
х= -1
5х+2у=11, при х=-1
2у=11-5*(-1)
2у=11+5
2у=16
у=8
2) методом сложения
9х-2у+х-2у=-17+7
10х=-10
х=-1
х-2у=7, при х=-1
-2у=7+1
-2у=8
у=-4
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Answers & Comments
7х+2у-5х-2у=9-11
2х=-2
х= -1
5х+2у=11, при х=-1
2у=11-5*(-1)
2у=11+5
2у=16
у=8
2) методом сложения
9х-2у+х-2у=-17+7
10х=-10
х=-1
х-2у=7, при х=-1
-2у=7+1
-2у=8
у=-4