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mmayyer
@mmayyer
July 2022
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Решите уравнения: а)9-7(х+3)=5-6х; б)(7х+9) - (11х-7)=8; в)3,6+5у=7(1,2-у)
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Tasdaser
Verified answer
а)9-7(х+3)=5-6х
9-7х-21=5-6х
-7х+6х=5+12
-х=17
х=-17
б)(7х+9) - (11х-7)=8
7х+9-11х+7=8
-4х=8-16
-4х=-8
х=2
в)3,6+5у=7(1,2-у)
3,6+5у=8,4-7у
5у+7у=8,4-3,6
12у=4,8
у=0,4
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Answers & Comments
Verified answer
а)9-7(х+3)=5-6х9-7х-21=5-6х
-7х+6х=5+12
-х=17
х=-17
б)(7х+9) - (11х-7)=8
7х+9-11х+7=8
-4х=8-16
-4х=-8
х=2
в)3,6+5у=7(1,2-у)
3,6+5у=8,4-7у
5у+7у=8,4-3,6
12у=4,8
у=0,4