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x in (-oo:+oo)
x-x+16/6 = 2*(x+6) // - 2*(x+6)
x-(2*(x+6))-x+16/6 = 0
x-2*(x+6)-x+16/6 = 0
x-2*(x+6)-x+8/3 = 0
(-2*3*(x+6))/3+(3*x)/3+(3*(-x))/3+8/3 = 0
3*x-2*3*(x+6)+3*(-x)+8 = 0
8-3*x-3*x-36 = 0
8-6*x-36 = 0
-6*x-28 = 0
(-6*x-28)/3 = 0
(-6*x-28)/3 = 0 // * 3
-6*x-28 = 0
-6*x-28 = 0 // + 28
-6*x = 28 // : -6
x = 28/(-6)
x = -14/3
x = -14/3
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