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8 3/4 - х= 3 5/16х= 8 3/4 - 3 5/16х= 8 12/16 - 3 5/16х=5 7/16х-9 3/7 = 6 5/14 - 5 8/21х-9 3/7 = 6 15/42 - 5 16/42х-9 3/7 = 5 57/42 - 16/42х-9 3/7 = 41/42х=41/42 + 9 3/7х=41/42 + 66/7х=41/42 + 396/42х=437/42х=10 17/42