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(68)2=4x-2
We move all terms to the left:
(68)2-(4x-2)=0
We get rid of parentheses
-4x+2+682=0
We add all the numbers together, and all the variables
-4x+684=0
We move all terms containing x to the left, all other terms to the right
-4x=-684
x=-684/-4
x=+171
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