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(4*x)/5-(x/4) = (7*x)/8-5 // - (7*x)/8-5
(4*x)/5-(x/4)-((7*x)/8)+5 = 0
(4*x)/5-(x/4)+(-7/8)*x+5 = 0
5-13/40*x = 0 // - 5
-13/40*x = -5 // : -13/40
x = -5/(-13/40)
x = 200/13
x = 200/13
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