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x in (-oo:+oo)
13-((3/2)*x) = 38 // - 38
13-((3/2)*x)-38 = 0
(-3/2)*x-38+13 = 0
-3/2*x-25 = 0 // + 25
-3/2*x = 25 // : -3/2
x = 25/(-3/2)
x = -50/3
x = -50/3
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