The phone company charges 15.00 per month for a local line plus 0.06 per call. How many calls were made in one month if the bill was 22.50?

Question

The phone company charges 15.00 per month for a local line plus 0.06 per call. How many calls were made in one month if the bill was 22.50?

Answer 1

Assume y=total bill for the month, and x=calls made.

y= 15+.06x

22.50=15+.06x (Subtract 15 from both sides)

7.5=.06x          (Divide both sides by .06)

125=x

There were 125 phone calls made that month.