-72+81х=4х+5
-72-5=4х-81х
-77=-77х
77х=77
Х=77:77
Х=1
Ответ х=1
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-72+81х=4х+5
-72-5=4х-81х
-77=-77х
77х=77
Х=77:77
Х=1
Ответ х=1