Tonya’s dog-walking service charges a flat rate of $20 per month, plus $3 per mile that each dog is walked. Beth does not charge a monthly fee for her dog-walking service, but she charges $5 per mile that each dog is walked. Part B m =
how many miles

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

-2

7 - 9 = -2

reversed:

-2 + 9 = 7