2.3^x=81-3^x

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Solution for 2.3^x=81-3^x equation: 



2.3^x=81-3^x

We move all terms to the left:

2.3^x-(81-3^x)=0

We get rid of parentheses

2.3^x+3^x-81=0

We move all terms containing x to the left, all other terms to the right

2.3^x+3^x=81

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