Thread: 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?

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:




Now you just need to solve for R.