The question is a subtraction problem.
We know that Addison earned 25 dollars and gave 18 to his friend.
We can solve this problem by making an equation : [tex]x=25-18[/tex]
Solve for x
[tex]x=25-18[/tex]
[tex]25-18 = 7 [/tex]
[tex]x=7[/tex]
Therefore, Addison has 7 dollars left.