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x in (-oo:+oo)
(-1/6)*(x-12)+(1/2)*(x+2) = x+27 // - x+27
(-1/6)*(x-12)+(1/2)*(x+2)-x-27 = 0
1/2*(x+2)-1/6*(x-12)-x-27 = 0
1/2*(x+2)-1/6*(x-12)-x-27 = 0
1/3*x-x-27+3 = 0
3-2/3*x-27 = 0
-2/3*x-24 = 0
-2/3*x-24 = 0
-2/3*x-24 = 0 // + 24
-2/3*x = 24 // : -2/3
x = 24/(-2/3)
x = -36
x = -36
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