If you spent your entire income, you could afford either 6 units of x and 13 units of y or 13 units of x and 6 units of y.If you spent your entire income on x, how many units of x could you buy?

A) 19
B) 32
C) 24
D) There is not enough information to determine the number of x.
E) None of the above.

The problem can be solved by setting up equations based on the given information. Let the price of one unit of x be Px and the price of one unit of y be Py. The total income can be represented in two ways: 6Px + 13Py or 13Px + 6Py. Since both expressions equal the total income, they can be set equal to each other. However, to find how many units of x can be bought with the total income, we don't need to solve for the prices. We can observe that the total number of units (x and y combined) that can be bought in either scenario is 19. Since the question asks for the number of units of x that can be bought with the entire income (assuming the price of x remains constant), and we know the total units of x and y combined that can be bought is 19, the answer is 19 units of x if all income is spent on x.