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20000=30*3^x
We move all terms to the left:
20000-(30*3^x)=0
We get rid of parentheses
-30*3^x+20000=0
Wy multiply elements
-90x+20000=0
We move all terms containing x to the left, all other terms to the right
-90x=-20000
x=-20000/-90
x=222+2/9
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