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x in (-oo:+oo)
(-1/4)*(x-8)+(1/2)*(x+2) = x-3 // - x-3
(-1/4)*(x-8)+(1/2)*(x+2)-x+3 = 0
1/2*(x+2)-1/4*(x-8)-x+3 = 0
1/2*(x+2)-1/4*(x-8)-x+3 = 0
1/4*x-x+3+3 = 0
3-3/4*x+3 = 0
6-3/4*x = 0
6-3/4*x = 0
6-3/4*x = 0 // - 6
-3/4*x = -6 // : -3/4
x = -6/(-3/4)
x = 8
x = 8
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