SOLUTION: If a child were four times his present age, he would be half as old as his father is now. If his father is 30 years old, how old is the child now?

Question 551663: If a child were four times his present age, he would be half as old as his father is now. If his father is 30 years old, how old is the child now?

Answer by ankor@dixie-net.com(22740) (Show Source): You can put this solution on YOUR website!
let c = child's present age
let f = father's age
:
If a child were four times his present age, he would be half as old as his father is now.
4c = .5f
we can simplify, multiply both sides by 2
8c = f
:
If his father is 30 years old, how old is the child now?
8c = 30
c =
c = 3.75 yrs old
:
:
Usually these problems have integer solutions, but not this one, check it out
4(3.75) = .5(30)
15 = 15
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