Hi! please help me, i don’t understand this.

One-third of the people from country a claim that they are from country b, and the rest admit they are from country a. one-fourth of the people from country claim that they are from country a, and the rest admit they are from country b. in a combined census of the two countries, one-half of the total claimed to be from a. what is the ratio of the populations of country a to that of country b.

Finding tbe values of the variables in each kite

Consider the first four terms of the sequence below. what is the 8th term of this sequence?