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(5*(x+4))/4 = 2*x-4 // - 2*x-4
(5*(x+4))/4-(2*x)+4 = 0
(5*(x+4))/4-2*x+4 = 0
(5*(x+4))/4+(-2*4*x)/4+(4^2)/4 = 0
5*(x+4)-2*4*x+16 = 0
16-3*x+20 = 0
36-3*x = 0
(36-3*x)/4 = 0
(36-3*x)/4 = 0 // * 4
36-3*x = 0
36-3*x = 0 // - 36
-3*x = -36 // : -3
x = -36/(-3)
x = 12
x = 12
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