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-12 (?)
4x - 7y = 12-7y = -4x + 12y = (4/7)x - (12/7)======================4x - 7y = 124x = 7y + 12x = (7/4)x + 3
4x-17=31 +17 +17 -------------- 4x = 48 --- ---- 4 4 x = 12
16
Let the number be x: 4x-12 = 60 4x = 60+12 4x = 72 x = 18