(x-7)2=21

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Solution for (x-7)2=21 equation: 



(x-7)2=21

We move all terms to the left:

(x-7)2-(21)=0

We multiply parentheses

2x-14-21=0

We add all the numbers together, and all the variables

2x-35=0

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

2x=35

x=35/2

x=17+1/2

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