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(2*x+3)/6 = (x-4)/2 // - (x-4)/2
(2*x+3)/6-((x-4)/2) = 0
(2*x+3)/6+(-1*(x-4))/2 = 0
(2*(2*x+3))/(2*6)+(-1*6*(x-4))/(2*6) = 0
2*(2*x+3)-1*6*(x-4) = 0
30-2*x = 0
(30-2*x)/(2*6) = 0
(30-2*x)/(2*6) = 0 // * 2*6
30-2*x = 0
30-2*x = 0 // - 30
-2*x = -30 // : -2
x = -30/(-2)
x = 15
x = 15
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