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x in (-oo:+oo)
(1/2)*(4*x-8)-(3*x)-6 = 90 // - 90
(1/2)*(4*x-8)-(3*x)-90-6 = 0
(1/2)*(4*x-8)-3*x-90-6 = 0
1/2*(4*x-8)-3*x-90-6 = 0
1/2*(4*x-8)-3*x-90-6 = 0
-x-90-6-4 = 0
-x-94-6 = 0
-x-100 = 0
-x-100 = 0
-x-100 = 0 // + 100
-x = 100 // * -1
x = -100
x = -100
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