Question

the phone company charges $15.00 per month for a local line plus $0.06 per call.how many calls were made if the bill was $22.50? note: use a variable to solve story problems

Answer 1

15 + 0.06c = 22.50
0.06c = 22.50 - 15
0.06c = 7.50
c = 7.50/0.06
c = 125 calls were made