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x in (-oo:+oo)
-(2*x)-1/3 = 71/3 // - 71/3
-(2*x)-1/3-(71/3) = 0
-2*x-1/3-71/3 = 0
-2*x-24 = 0 // + 24
-2*x = 24 // : -2
x = 24/(-2)
x = -12
x = -12
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