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x in (-oo:+oo)
-(3*x)-5 = -13/2 // + -13/2
-(3*x)-(-13/2)-5 = 0
13/2-3*x-5 = 0
3/2-3*x = 0 // - 3/2
-3*x = -3/2 // : -3
x = -3/2/(-3)
x = 1/2
x = 1/2
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