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3*5^x-4=12
We move all terms to the left:
3*5^x-4-(12)=0
We add all the numbers together, and all the variables
3*5^x-16=0
Wy multiply elements
15x-16=0
We move all terms containing x to the left, all other terms to the right
15x=16
x=16/15
x=1+1/15
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