We assume, that the number 39 is 100% because it's the output value of the task and we all know that x is the value we are looking for. If 100% equals 39, so we can write it down as 100%=39 and x% equals 14 of the output value, so we can write it down as x%=14. And with that we have 2 equations we can solve.
Lets solve:
100%=39 and x%=14.
100%/x%=39/14
(100/x)*x=(39/14)*x - we multiply both sides of the equation by x
100=2.78*x - we divide both sides of the equation by (2.78) to get x
Pamela is 13 years younger than Jiri and the sum of their ages is 41, therefore (x=Jiri's age) (x-13) + x = 41) 2x-13=41 x=14. Pamela is 14 and Jiri is 27
