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3*x+x+8/4+55/7 = 17 // - 17
3*x+x+8/4+55/7-17 = 0
4*x-50/7 = 0 // + 50/7
4*x = 50/7 // : 4
x = 50/7/4
x = 25/14
x = 25/14
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