Question 1073358: « I'm three times as old as you were when I was as old as you are now. When you will be my age, together we will be 13370 years old. »
Answer by ikleyn(52803)   (Show Source):
You can put this solution on YOUR website! .
« I'm three times as old as you were when I was as old as you are now. When you will be my age, together we will be 13370 years old. »
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Let M = my age now
Let Y = your age now,
so my variables are consistent with those of Edwin McCravy.
When it was happened when "I was as old as you are now" ?
Obviously, it was (M-Y) years ago.
So, your first equation is
M = 3*(Y-(M-Y)). (1)
Now, when "you will be my age" ? - Obviously, in (M-Y) years.
Therefore, your second equation is
(M + (M-Y)) + (Y + (M-Y)) = 13370. (2)
The rest is just a technique.
Answer. M = 5730, Y = 3820.
Many of problems similar to this one were solved with detailed explanations in the lesson
- Really intricate age word problem
in this site.
There is a bunch of lessons on age word problems
- Age problems and their solutions
- A fresh formulation of a traditional age problem
- Really intricate age word problem (*)
- Selected age word problems from the archive
in this site.
Read them and become an expert in solving age problems.
Also, you have this free of charge online textbook in ALGEBRA-I in this site
- ALGEBRA-I - YOUR ONLINE TEXTBOOK.
The referred lessons are the part of this online textbook under the topic "Age word problems".
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