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x in (-oo:+oo)
(2*x+4)/4 = 3*x-4 // - 3*x-4
(2*x+4)/4-(3*x)+4 = 0
(2*x+4)/4-3*x+4 = 0
(2*x+4)/4+(-3*4*x)/4+(4^2)/4 = 0
2*x-3*4*x+4+16 = 0
4-10*x+16 = 0
20-10*x = 0
(20-10*x)/4 = 0
(20-10*x)/4 = 0 // * 4
20-10*x = 0
20-10*x = 0 // - 20
-10*x = -20 // : -10
x = -20/(-10)
x = 2
x = 2
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