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5000000=1000000^0.645(t)
We move all terms to the left:
5000000-(1000000^0.645(t))=0
We get rid of parentheses
-1000000^0.645t+5000000=0
We move all terms containing t to the left, all other terms to the right
-1000000^0.645t=-5000000
t=-5000000/1
t=-5000000
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