-13^2-21x+13=0

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Solution for -13^2-21x+13=0 equation: 



-13^2-21x+13=0

We add all the numbers together, and all the variables

-21x-156=0

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

-21x=156

x=156/-21

x=-7+3/7

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