Question 31025
Fred's time = {{{x/27}}} or the number of miles [OVER] {{{27 miles/hour}}} [[leaving only hours in the answer]]
Kim's time = {{{2+x/45}}} or two hours plus the number of miles [OVER] {{{45 miles/hour}}}

setting these two equation equal to each other will give us the number of hours until Kim and Fred are at the same place.

{{{x/27=2+x/45}}}multiply both sides by 27 then by 45 to cancel out the denominators
{{{45x=27*2+27x}}}
{{{45x=54+27x}}} subtract 27x from both sides
{{{18x=54}}} divide by 18
{{{x=3}}} or 3 hours until Kim overtakes Fred.