How do I solve this math problem? 25 divided by r = 5

Question

It is a simple division problem, I just can't remember from when I was in high school how to do it and I am trying to help my daughter with her homework.  I remembered the addition, subtraction and multiplication in algebra but I can't remember how to do the division problems.  It has been a while since I have been in school.

Answer 1

k, sounds like 25/r = 5

the best way to explain it to her is to put 5/1

so 25/r = 5/1 then cross multiply

5r = 25(1)

5r = 25

divide both sides by 5 and r = 5