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7^x/3=12
We move all terms to the left:
7^x/3-(12)=0
We multiply all the terms by the denominator
7^x-12*3=0
We add all the numbers together, and all the variables
7^x-36=0
We move all terms containing x to the left, all other terms to the right
7^x=36
x=36/1
x=36
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