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x in (-oo:+oo)
(1/4)*(8-(10*x))+(1/2)*x = 5 // - 5
(1/4)*(8-(10*x))+(1/2)*x-5 = 0
(1/4)*(8-10*x)+(1/2)*x-5 = 0
1/4*(8-10*x)+x/2-5 = 0
(1/4*2*(8-10*x))/2+x/2+(-5*2)/2 = 0
1/4*2*(8-10*x)+x-5*2 = 0
4-4*x-10 = 0
-4*x-6 = 0
(-4*x-6)/2 = 0
(-4*x-6)/2 = 0 // * 2
-4*x-6 = 0
-4*x-6 = 0 // + 6
-4*x = 6 // : -4
x = 6/(-4)
x = -3/2
x = -3/2
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