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x in (-oo:+oo)
-3*x-(5/2) = 19/2 // - 19/2
-3*x-(5/2)-(19/2) = 0
-3*x-5/2-19/2 = 0
-3*x-12 = 0 // + 12
-3*x = 12 // : -3
x = 12/(-3)
x = -4
x = -4
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