1)
6х-у=17
-2у=10
2)
у= -5
3)
6х-(-5) = 17
4)
х=2
(х;у) = (2;-5)
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Answers & Comments
1)
6х-у=17
-2у=10
2)
6х-у=17
у= -5
3)
6х-(-5) = 17
4)
х=2
(х;у) = (2;-5)