Answer:
So after 10 miles charging amount will be same for Tonya and Beth.
Step-by-step explanation:
Tonya dog,
Walking service charge=$20\month
charge for each mile=$3
Beth dog,
Walking service charge=$0
charge for each mile=$5
Let after x miles both tonya and beth have same charging amount.
So after x miles amount charged by tonya = 20+3x
After x miles amount charged by Beth = 5x