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3^2x=4*5^x+3
We move all terms to the left:
3^2x-(4*5^x+3)=0
We get rid of parentheses
3^2x-4*5^x-3=0
Wy multiply elements
3^2x-20x-3=0
We add all the numbers together, and all the variables
-20x+3^2x-3=0
We move all terms containing x to the left, all other terms to the right
-20x+3^2x=3
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