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x in (-oo:+oo)
(1/2)*(x+2)-((1/6)*(x-18)) = x+16 // - x+16
(1/2)*(x+2)-((1/6)*(x-18))-x-16 = 0
(-1/6)*(x-18)+(1/2)*(x+2)-x-16 = 0
1/2*(x+2)-1/6*(x-18)-x-16 = 0
1/2*(x+2)-1/6*(x-18)-x-16 = 0
1/3*x-x-16+4 = 0
4-2/3*x-16 = 0
-2/3*x-12 = 0
-2/3*x-12 = 0
-2/3*x-12 = 0 // + 12
-2/3*x = 12 // : -2/3
x = 12/(-2/3)
x = -18
x = -18
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