Question

You pay 3.3 cents per minute for long-distance phone calls on your phone. Your phone bill is $3.40. Write and solve an equation to find the number of minutes m of long-distance calls you made.

Answer 1

3.3 cents per minute...


Let m be the number of minutes.


The cost in *cents* would be:

3.3m


That would equal $3.40, but we need the same units of *cents*, so that equals 340 cents.


3.3m = 340


From there you can easily solve for m.


33m = 3400

m = 3400/33

m = 103 1/33 minutes