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x in (-oo:+oo)
x/2 = 2*(x+2) // - 2*(x+2)
x/2-(2*(x+2)) = 0
x/2-2*(x+2) = 0
(-2*2*(x+2))/2+x/2 = 0
x-2*2*(x+2) = 0
-3*x-8 = 0
(-3*x-8)/2 = 0
(-3*x-8)/2 = 0 // * 2
-3*x-8 = 0
-3*x-8 = 0 // + 8
-3*x = 8 // : -3
x = 8/(-3)
x = -8/3
x = -8/3
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