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(2*(x+4))/15 = 3*x-1 // - 3*x-1
(2*(x+4))/15-(3*x)+1 = 0
(2*(x+4))/15-3*x+1 = 0
(2*(x+4))/15+(-3*15*x)/15+(1*15)/15 = 0
2*(x+4)-3*15*x+1*15 = 0
8-43*x+15 = 0
23-43*x = 0
(23-43*x)/15 = 0
(23-43*x)/15 = 0 // * 15
23-43*x = 0
23-43*x = 0 // - 23
-43*x = -23 // : -43
x = -23/(-43)
x = 23/43
x = 23/43
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