Question 551663
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 = {{{30/8}}}
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