What is the answer to the problem 2x+8+2x=4(x+2)

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.

Ineed me i stuck and i don’t want to get it wrong

Find the nonpermissible replacement for binthis expression.b2/5b +5