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x in (-oo:+oo)
(-1/4)*(x-8)+1/2 = x+3 // - x+3
(-1/4)*(x-8)-x+1/2-3 = 0
1/2-1/4*(x-8)-x-3 = 0
(-1/4*2*(x-8))/2+(2*(-x))/2+1/2+(-3*2)/2 = 0
2*(-x)-1/4*2*(x-8)-3*2+1 = 0
1-5/2*x-6+4 = 0
5-5/2*x-6 = 0
-5/2*x-1 = 0
(-5/2*x-1)/2 = 0
(-5/2*x-1)/2 = 0 // * 2
-5/2*x-1 = 0
-5/2*x-1 = 0 // + 1
-5/2*x = 1 // : -5/2
x = 1/(-5/2)
x = -2/5
x = -2/5
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