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Knl · Answer 1 · 2020-07-30T22:55:03+0000

Y is next year, so subtract 1 year from Y to get present age, X.

Y - 1 = X

We know Y is her age next year which is 10 years. So, Y=10

10-1=X
X =9 years.

She is 9 years older and will be 10 years next birthday.

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