A city doubles its size every 64 year. If the population is currently 225,000, what will the population be in 128 years?
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Are you trying to find x, or are you only suppose to translate it?
If you are trying to find x, you first multiply 2x on both sides
100 = 10(2x)
Divide 10 on both sides
10 = 2x
Divide 2 on both sides
5 = x