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x in (-oo:+oo)
(2*(x+2))/3 = x+6 // - x+6
(2*(x+2))/3-x-6 = 0
(2*(x+2))/3+(3*(-x))/3+(-6*3)/3 = 0
2*(x+2)+3*(-x)-6*3 = 0
4-x-18 = 0
-x-14 = 0
(-x-14)/3 = 0
(-x-14)/3 = 0 // * 3
-x-14 = 0
-x-14 = 0 // + 14
-x = 14 // * -1
x = -14
x = -14
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