# Math Help - Primary 5 math problem sum 1

1. ## Primary 5 math problem sum 1

4/5 of cheyenne's present age is 1/3 of Ryan's age in 3 years' time.
Their total age in 5 years' time is 58.
What is Ryan's present age?

2. Originally Posted by mytan1963
4/5 of cheyenne's present age is 1/3 of Ryan's age in 3 years' time.
Their total age in 5 years' time is 58.
What is Ryan's present age?
Let C be Cheyenne's present age, and let R be Ryan's present age.

Then you have:

$\frac {4C} 5 = \frac {R+3} 3$
$(C+5) + (R+5) = 58$

Now you just need to solve for R.