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6*x-((12/14)*x)+6*70*x+(30/36)*x-72 = 0
6*x+(-6/7)*x+6*70*x+(30/36)*x-72 = 0
17891/42*x-72 = 0 // + 72
17891/42*x = 72 // : 17891/42
x = 72/17891/42
x = 3024/17891
x = 3024/17891
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