math
posted by sarah .
You buy a bottle of juice for $1.00. The juice costs .90 cents more than the empty bottle. How much does the empty bottle cost?? The answer is not 10 cents, or $1.00

Do you really mean 0.90 cents for your second number? or 0.90 dollars? (90 cents)
I will assume the latter.
Empty bottle cost + Juice cost = 1.00
Empty bottle cost + (Empty bottle cost + 0.90) = 1.00
2*(empty bottle cost) = 0.10
empty bottle cost = 0.05
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