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(5*x)/7 = 3*x-8 // - 3*x-8
(5*x)/7-(3*x)+8 = 0
(5*x)/7-3*x+8 = 0
8-16/7*x = 0 // - 8
-16/7*x = -8 // : -16/7
x = -8/(-16/7)
x = 7/2
x = 7/2
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