Ответ:
4.
а) -1/9х=3
х=3/1:1/9
х=-3
б)7+х=1-5х
х+5х=1-7
6х=-6
х=-1
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Ответ:
4.
а) -1/9х=3
х=3/1:1/9
х=-3
б)7+х=1-5х
х+5х=1-7
6х=-6
х=-1