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7*x+5/7+8/7 = (3*x)/7 // - (3*x)/7
7*x-((3*x)/7)+5/7+8/7 = 0
7*x+(-3/7)*x+5/7+8/7 = 0
46/7*x+13/7 = 0 // - 13/7
46/7*x = -13/7 // : 46/7
x = -13/7/46/7
x = -13/46
x = -13/46
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