SOLUTION: jane is 7 years older than amy. Twelves years ago, Amy was half as old as jane is now. How old is jane now?

Question 1106480: jane is 7 years older than amy. Twelves years ago, Amy was half as old as jane is now. How old is jane now?
Answer by Edwin McCravy(20054) (Show Source): You can put this solution on YOUR website!

J = Jane's age now
A = Amy's age now

jane is 7 years older than amy.

J = A + 7

Twelve years ago, Amy was...

Twelve years ago, Amy was A-12

Twelve years ago, Amy was half as old as jane is now.

 

So we have the system of equations:



Multiply both sides of the second equation by 2:



How old is jane now?

Solve the system by substitution.  If you have trouble,
tell me in the message form below and I'll get back to 
by email.

Edwin

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