X^2-6x+21=x^2+7x-8

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Solution for X^2-6x+21=x^2+7x-8 equation: 



X^2-6X+21=X^2+7X-8

We move all terms to the left:

X^2-6X+21-(X^2+7X-8)=0

We get rid of parentheses

X^2-X^2-6X-7X+8+21=0

We add all the numbers together, and all the variables

-13X+29=0

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

-13X=-29

X=-29/-13

X=2+3/13

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