Question 773541: I am 16 years old. i'm also 4 times older than my sister. after many years i'm will be 2 times older than my sister. how old i am?
Found 2 solutions by Alan3354, MathTherapy:
Answer by Alan3354(69443)   (Show Source):
You can put this solution on YOUR website! I am 16 years old. i'm also 4 times older than my sister. after many years i'm will be 2 times older than my sister. how old i am?
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4 times older = 5 times as old.
--> she's 3.2 years old.
The difference is 12.8 years, and will remain constant.
--> 2 times older = 3 times as old
your age + 12.8 = 3*your age
After 6.4 years.
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If 4 times older = 4 times as old, then how much is 1 times older, or a 100% increase?
They are not the same.
Answer by MathTherapy(10552)  (Show Source):
You can put this solution on YOUR website!
I am 16 years old. i'm also 4 times older than my sister. after many years i'm will be 2 times older than my sister. how old i am?
In  years, you'll be twice your sister's age. At that time, you'll be  years-old, obviously.
You can do the check!!
Further help is available, online or in-person, for a fee, obviously. Send comments, “thank-yous,” and inquiries to “D” at MathMadEzy@aol.com
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