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2000=250*2^x
We move all terms to the left:
2000-(250*2^x)=0
We get rid of parentheses
-250*2^x+2000=0
Wy multiply elements
-500x+2000=0
We move all terms containing x to the left, all other terms to the right
-500x=-2000
x=-2000/-500
x=+4
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