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(4*x)/5-((7*x)/4) = (7*x)/8-17 // - (7*x)/8-17
(4*x)/5-((7*x)/4)-((7*x)/8)+17 = 0
(4*x)/5+(-7/4)*x+(-7/8)*x+17 = 0
17-73/40*x = 0 // - 17
-73/40*x = -17 // : -73/40
x = -17/(-73/40)
x = 680/73
x = 680/73
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