x+1-3x=-21 - solution

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Solution for x+1-3x=-21 equation:

x in (-oo:+oo)

x-(3*x)+1 = -21 // + 21

x-(3*x)+1+21 = 0

x-3*x+1+21 = 0

22-2*x = 0 // - 22

-2*x = -22 // : -2

x = -22/(-2)

x = 11

x = 11

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