12-01-2023
Mathematics

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Nine years ago, Katie was twice as old as Elena was then. Elena realizes, "In four years, I'll be as old as Katie is now!" Elena writes these equations to help make sense of the situation: k - 9 = 2(e - 9)
e + 4 = k

If Elena is currently e years old and Katie is k years old, how old is Katie now?

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