3^(x)+3^(x+2)=81

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Solution for 3^(x)+3^(x+2)=81 equation: 



3^(x)+3^(x+2)=81

We move all terms to the left:

3^(x)+3^(x+2)-(81)=0

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

3^x+3^(x+2)=81

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