9*(7512-с)=34722
7512-с=34722:9
7512-с=3858
с=7512-3858
с=3654
9*(7512-3654)=34722
9*3858=34722
34722=34722
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9*(7512-с)=34722
7512-с=34722:9
7512-с=3858
с=7512-3858
с=3654
9*(7512-3654)=34722
9*3858=34722
34722=34722