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x in (-oo:+oo)
(3/2)*(8-(2*x)) = -3 // + 3
(3/2)*(8-(2*x))+3 = 0
(3/2)*(8-2*x)+3 = 0
3/2*(8-2*x)+3 = 0
3/2*(8-2*x)+3 = 0
15-3*x = 0
15-3*x = 0
15-3*x = 0 // - 15
-3*x = -15 // : -3
x = -15/(-3)
x = 5
x = 5
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