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(6*x+18)/5 = 2*x-4 // - 2*x-4
(6*x+18)/5-(2*x)+4 = 0
(6*x+18)/5-2*x+4 = 0
(6*x+18)/5+(-2*5*x)/5+(4*5)/5 = 0
6*x-2*5*x+4*5+18 = 0
18-4*x+20 = 0
38-4*x = 0
(38-4*x)/5 = 0
(38-4*x)/5 = 0 // * 5
38-4*x = 0
38-4*x = 0 // - 38
-4*x = -38 // : -4
x = -38/(-4)
x = 19/2
x = 19/2
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