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x in (-oo:+oo)
-5*x-3 = -(3*x)-19 // + -(3*x)-19
3*x-5*x-3+19 = 0
16-2*x = 0 // - 16
-2*x = -16 // : -2
x = -16/(-2)
x = 8
x = 8
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