my book lists enequality solving examples as simple substitution, such as

Decide whether 4 is a solution of the inequality.

Problem:2x- 1 < 8

Solution:2(4) - 1 < 8

4 is a solution.

but in the actual work, problems are listed like this:

Check whether the given number is a solution of the inequality.

Problem:n- 2 < 6; 3

is the number after the semicolon the given number, or is it another part altogether? thanks in advance