Answer:
[tex]1\frac{4}{5}mn[/tex]
Step-by-step explanation:
[tex]104mn - 84mn = 36 \\ \\ 20mn = 36 \\ \\ 1\frac{4}{5}mn[/tex]
This what you can do unless you are solving for either variable.
I am joyous to assist you anytime.
