SOLUTION: Jack is twice as old as Jill.In 2 years, Jack will be four times as old as Jill was 9 years ago. How old are they now?
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Question 1153387: Jack is twice as old as Jill.In 2 years, Jack will be four times as old as Jill was 9 years ago. How old are they now?
Found 2 solutions by josgarithmetic, MathLover1:
Answer by josgarithmetic(39615) (Show Source): You can put this solution on YOUR website!
------------------Jill is 19 and Jack is 38.
Answer by MathLover1(20849) (Show Source): You can put this solution on YOUR website!
Jack is twice as old as Jill.In 2 years, Jack will be four times as old as Jill was 9 years ago.
let Jack's age be and Jill's age
if Jack is twice as old as Jill, we have
......eq.1
if in years, Jack will be as old as Jill was years ago, we have
.......eq.2
from eq.1 and eq.2 we have,
go to
......eq.1, substitute
Jack is years old now and Jill is years old now
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