Ответ:
1) 2х+5х=36
7х=36
х=5.1(428)
2) 2х-11х=42
-9х=42
х=-4.6(6)
3) 2х+х=56
3х=56
х=15.6(667)
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Ответ:
1) 2х+5х=36
7х=36
х=5.1(428)
2) 2х-11х=42
-9х=42
х=-4.6(6)
3) 2х+х=56
3х=56
х=15.6(667)