-2x-1+x=3 - solution

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Solution for -2x-1+x=3 equation:

x in (-oo:+oo)

x-2*x-1 = 3 // - 3

x-2*x-3-1 = 0

-x-4 = 0 // + 4

-x = 4 // * -1

x = -4

x = -4

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