Ответы и объяснения

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2013-10-02T16:41:31+04:00
2013-10-02T16:45:35+04:00
3х-0.6=х+4.4                         4х-(7х-2)=17
3х-х=4.4+0.6                         4х-7х+2=17
2х=5                                      4х-7х=17-2
х=5:2                                     -3х=15
х=5/2                                     х=15:(-3)
х=2 1/2                                  х=-5