X^2+21x+11-x^2=0

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Solution for X^2+21x+11-x^2=0 equation: 



X^2+21X+11-X^2=0

We add all the numbers together, and all the variables

21X+11=0

We move all terms containing X to the left, all other terms to the right

21X=-11

X=-11/21

X=-11/21

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