3x=3^7

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Solution for 3x=3^7 equation: 



3x=3^7

We move all terms to the left:

3x-(3^7)=0

We add all the numbers together, and all the variables

3x-2187=0

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

3x=2187

x=2187/3

x=729

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