Ответ:
3х+7у=9
3х=9-7у
-3•(9-7у)+2у=-7
21-21у+2у=-7
23у=-7-21
23у=-28
у=1,2
6х-5•1,2=16
6х-6=16
6х=10
х=1,7
(х=1,7;у=1,2)
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Ответ:
3х+7у=9
3х=9-7у
-3•(9-7у)+2у=-7
21-21у+2у=-7
23у=-7-21
23у=-28
у=1,2
6х-5•1,2=16
6х-6=16
6х=10
х=1,7
(х=1,7;у=1,2)