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(2*x-3)/4+20 = 3*x // - 3*x
(2*x-3)/4-(3*x)+20 = 0
(2*x-3)/4-3*x+20 = 0
(2*x-3)/4+(-3*4*x)/4+(4*20)/4 = 0
2*x-3*4*x+4*20-3 = 0
80-10*x-3 = 0
77-10*x = 0
(77-10*x)/4 = 0
(77-10*x)/4 = 0 // * 4
77-10*x = 0
77-10*x = 0 // - 77
-10*x = -77 // : -10
x = -77/(-10)
x = 77/10
x = 77/10
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