3^1-x=7^x

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Solution for 3^1-x=7^x equation: 



3^1-x=7^x

We move all terms to the left:

3^1-x-(7^x)=0

We add all the numbers together, and all the variables

-1x-7^x+3=0

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

-1x-7^x=-3

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