SOLUTION: I am 30 years old and my sister is 10. I need an equation to figure out how old my sister and I will be when I am three times as old as my sister.

Question 599852: I am 30 years old and my sister is 10. I need an equation to figure out how old my sister and I will be when I am three times as old as my sister.
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
I am 30 years old and my sister is 10. I need an equation to figure out how old my sister and I will be when I am three times as old as my sister.
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You are now 3 times as old as old as your sister.
That will never happen at a later or earlier age.
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Maybe you would like to know whan you will be 5 times
as old as your sister.
Equation:
(30+x) = 5(10+x)
30+x = 50 + 5x
4x = -20
x = -5
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When you are 30-5 = 25 you will be 5 times as old
as your sister, who will be 10-5 = 5...
So that happened in the past; and it will never happen again.
Cheers,
Stan H.
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