SOLUTION: Luis is 36 years old and William is 6 years old. How many years will it take until Luis is only 3 times as old as William?

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Question 900381:
Luis is 36 years old and William is 6 years old.
How many years will it take until Luis is only 3 times as old as William?
Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!
Luis is 36 years old and William is 6 years old.
How many years ++highlight_green%28x%29+ will it take until Luis is only 3 times as old as William?
36 + x =3(6+x)
18 = 2x
9 = x, number of years it will take
And...
45 = 3(15)