X(13-x)=45

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Solution for X(13-x)=45 equation: 



X(13-X)=45

We move all terms to the left:

X(13-X)-(45)=0

We add all the numbers together, and all the variables

X(-1X+13)-45=0

We multiply parentheses

-1X^2+13X-45=0

a = -1; b = 13; c = -45;
Δ = b2-4ac
Δ = 132-4·(-1)·(-45)
Δ = -11
Delta is less than zero, so there is no solution for the equation

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