Question 997226: jill is 0
bill is 28
how old will they be when bill is 3 times her age?
Answer by Theo(13342)   (Show Source):
You can put this solution on YOUR website! let x = jill's age.
then x + 28 = bill's age.
let y = the number of years it will take for bill's age to be equal to 3 * jill's age.
you get (x + 28) + y = 3 * (x + y)
since x = 0, the equation becomes:
28 + y = 3 * y
subtract y from both sides of this equation to get:
28 = 2 * y
divide both sides of this equation by 2 to get:
y = 14
in 14 years, bill's age will be 3 * jill's age.
bill will be 28 + 14 = 42
jill will be 14
3 * 14 = 42
solution is:
bill will be 42
jill will be 14.
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