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x in (-oo:+oo)
2 = (2*x+6)/4 // - (2*x+6)/4
2-((2*x+6)/4) = 0
(-1*(2*x+6))/4+2 = 0
(-1*(2*x+6))/4+(2*4)/4 = 0
2*4-1*(2*x+6) = 0
2-2*x = 0
(2-2*x)/4 = 0
(2-2*x)/4 = 0 // * 4
2-2*x = 0
2-2*x = 0 // - 2
-2*x = -2 // : -2
x = -2/(-2)
x = 1
x = 1
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