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7^x+2-14*7^x=5
We move all terms to the left:
7^x+2-14*7^x-(5)=0
We add all the numbers together, and all the variables
7^x-14*7^x-3=0
Wy multiply elements
7^x-98x-3=0
We add all the numbers together, and all the variables
-98x+7^x-3=0
We move all terms containing x to the left, all other terms to the right
-98x+7^x=3
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