SOLUTION:

Question 95520:
Found 2 solutions by checkley71, krb88417:
Answer by checkley71(8403) (Show Source): You can put this solution on YOUR website!
13=8-6r
6r=8-13
6r=-5
r=-5/6 answer.
Answer by krb88417(2) (Show Source): You can put this solution on YOUR website!
13=8-6r
6r=8-13
6r=-5
r=-5/6