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x in (-oo:+oo)
(1/4)*(x-12)+(1/2)*(x+2) = x+4 // - x+4
(1/4)*(x-12)+(1/2)*(x+2)-x-4 = 0
1/4*(x-12)+1/2*(x+2)-x-4 = 0
1/4*(x-12)+1/2*(x+2)-x-4 = 0
3/4*x-x-4-2 = 0
-1/4*x-4-2 = 0
-1/4*x-6 = 0
-1/4*x-6 = 0
-1/4*x-6 = 0 // + 6
-1/4*x = 6 // : -1/4
x = 6/(-1/4)
x = -24
x = -24
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