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(3-x)2=16
We move all terms to the left:
(3-x)2-(16)=0
We add all the numbers together, and all the variables
(-1x+3)2-16=0
We multiply parentheses
-2x+6-16=0
We add all the numbers together, and all the variables
-2x-10=0
We move all terms containing x to the left, all other terms to the right
-2x=10
x=10/-2
x=-5
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