In order to figure out who will go first in a game, your friend asks you to pick a number between 1 and 25. what are the possible outcomes?

Step-by-step explanation:

The possible outcomes include 1, 2, 3, etc., up through 25.  This in itself is insufficient to specify who will go first.  There must be some further criteria.

Suppose each player chooses and announces a number from this set by writing it down on a scrap of paper which is placed face-down on the table.  The person who chooses the smaller number goes first.  Or, the person who chooses the larger number goes first.

you can't solve x because it is 2 linear equation and you only have one equation