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5^-3x=9^x+2
We move all terms to the left:
5^-3x-(9^x+2)=0
We add all the numbers together, and all the variables
-3x-(9^x+2)=0
We get rid of parentheses
-3x-9^x-2=0
We move all terms containing x to the left, all other terms to the right
-3x-9^x=2
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