Ответ:
5−y=3/7
—————
4
7(5−y)=12
35−7y=12
−7y=12−35
−7y=−23
y=23/3
y=3 целых2/7
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Ответ:
5−y=3/7
—————
4
7(5−y)=12
35−7y=12
−7y=12−35
−7y=−23
y=23/3
y=3 целых2/7