1)7х-5х=-35+15
2х=-10
х=-5
2)8у+у=-17-10
9у=-27
у=-3
3)2х-12+15х=13х+4
17х-13х=4+12
4х=16
х=4
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Answers & Comments
1)7х-5х=-35+15
2х=-10
х=-5
2)8у+у=-17-10
9у=-27
у=-3
3)2х-12+15х=13х+4
17х-13х=4+12
4х=16
х=4