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x in (-oo:+oo)
(1/2)*(8-x) = 8-(x/3) // - 8-(x/3)
(1/2)*(8-x)+x/3-8 = 0
1/2*(8-x)+x/3-8 = 0
(1/2*3*(8-x))/3+x/3+(-8*3)/3 = 0
1/2*3*(8-x)+x-8*3 = 0
12-1/2*x-24 = 0
-1/2*x-12 = 0
(-1/2*x-12)/3 = 0
(-1/2*x-12)/3 = 0 // * 3
-1/2*x-12 = 0
-1/2*x-12 = 0 // + 12
-1/2*x = 12 // : -1/2
x = 12/(-1/2)
x = -24
x = -24
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