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(3*x-1)/5 = (8-x)/1 // - (8-x)/1
(3*x-1)/5-((8-x)/1) = 0
(3*x-1)/5+x-8 = 0
(3*x-1)/5+(5*x)/5+(-8*5)/5 = 0
3*x+5*x-8*5-1 = 0
8*x-40-1 = 0
8*x-41 = 0
(8*x-41)/5 = 0
(8*x-41)/5 = 0 // * 5
8*x-41 = 0
8*x-41 = 0 // + 41
8*x = 41 // : 8
x = 41/8
x = 41/8
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