SOLUTION: Mary is three times as old as Jill. In five years, she will be twice as old as Jill. Find the present age of Mary.

Question 1189011: Mary is three times as old as Jill. In five years, she will be twice as old as Jill. Find the present age of Mary.

Found 2 solutions by Alan3354, ikleyn:
Answer by Alan3354(69443) (Show Source): You can put this solution on YOUR website!
Mary is three times as old as Jill. In five years, she will be twice as old as Jill. Find the present age of Mary.
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M = 3J
M+5 = 2(J+5)
etc

Answer by ikleyn(52788) (Show Source): You can put this solution on YOUR website!
.

Jill is x years old Mary is 3x years old. In 5 years 3x + 5 = 2*(x+5). Simplify and find x 3x + 5 = 2x + 10 3x - 2x = 10 - 5 x = 5 ANSWER. Mary is 3x = 3*5 = 15 years old now.

Solved.

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