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0=15^2-7x-2
We move all terms to the left:
0-(15^2-7x-2)=0
We add all the numbers together, and all the variables
-(15^2-7x-2)=0
We get rid of parentheses
7x+2-15^2=0
We add all the numbers together, and all the variables
7x-223=0
We move all terms containing x to the left, all other terms to the right
7x=223
x=223/7
x=31+6/7
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