I believe it would be this
Answer:
1990 and 2010

Explanation:
Let:

We need to know, in what year(s) the villages had the same population, mathematically this is:

So:

Solving for x:
Factoring

Hence:

Therefore the year(s) which the village had the same population are:

In order to find the population of both cities during the year(s) of equal population, just evalue the equations at x=15 and x=35:

<em>A</em><em> </em><em>statement of financial position, a statement of profit or loss and other comprehensive income, a statement of changes in equity and a statement of cash flows.</em><em> </em>
Mixing an acid and a base