Bunuel wrote:
Five years ago, Juliet was three times as old as Will. If Juliet is currently twice as old as Will, how old is Juliet?
A. -10
B. 10
C. 15
D. 20
E. 25
We can let Juliet’s current age = J and Will’s current age = W.
Since five years ago Juliet was three times as old as Will:
J - 5 = 3(W - 5)
J - 5 = 3W - 15
J = 3W - 10
Since Juliet is currently twice as old as Will:
J = 2W
We can substitute 2W for J in our first equation and we have:
2W = 3W - 10
10 = W
Since W = 10, J =
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