12^2+9^2=x

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Solution for 12^2+9^2=x equation: 



12^2+9^2=x

We move all terms to the left:

12^2+9^2-(x)=0

We add all the numbers together, and all the variables

-1x+225=0

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

-x=-225

x=-225/-1

x=+225

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