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