It says "there are x students trying out for a solo in a chorus concert. Only 6 will be chosen. How many students will not be chosen?"

x - 6

To find out how many students will not be chosen for the solo in the chorus concert, we need to subtract the number of students who will be chosen from the total number of students trying out.

Let's assume there are x students trying out for the solo.

Since only 6 students will be chosen, the number of students who will not be chosen can be calculated by subtracting the number of students who will be chosen from the total number of students trying out.

Number of students not chosen = Total number of students trying out - Number of students chosen

Therefore, the answer is x - 6.