Ответ:
5х-4х=1+7
х=8
4х-2х=-5.5-3.5
2х=-9
х=-4.5
6х+4+х=5х+4
7х+4=5х+4
7х-5х=0
х=0
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Ответ:
5х-4х=1+7
х=8
4х-2х=-5.5-3.5
2х=-9
х=-4.5
6х+4+х=5х+4
7х+4=5х+4
7х-5х=0
х=0