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x in (-oo:+oo)
(3*(x+4))/4 = 2*x-2 // - 2*x-2
(3*(x+4))/4-(2*x)+2 = 0
(3*(x+4))/4-2*x+2 = 0
(3*(x+4))/4+(-2*4*x)/4+(2*4)/4 = 0
3*(x+4)-2*4*x+2*4 = 0
8-5*x+12 = 0
20-5*x = 0
(20-5*x)/4 = 0
(20-5*x)/4 = 0 // * 4
20-5*x = 0
20-5*x = 0 // - 20
-5*x = -20 // : -5
x = -20/(-5)
x = 4
x = 4
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