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2x^2x2x^2-1=15
We move all terms to the left:
2x^2x2x^2-1-(15)=0
We add all the numbers together, and all the variables
2x^2x2x^2-16=0
We move all terms containing x to the left, all other terms to the right
2x^2x2x^2=16
x=16/1
x=16
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