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2^-3x=2^-x
We move all terms to the left:
2^-3x-(2^-x)=0
We add all the numbers together, and all the variables
-3x-(2^-x)=0
We get rid of parentheses
-3x+x-2^=0
We add all the numbers together, and all the variables
-2x=0
x=0/-2
x=0
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