Danielle's basic cell phone rate each month is $29.95. Add to that $5.95 for voice mail and $2.95 for text messaging. This past month Danielle spent an additional C dollars on long distance. Her total bill was $77.70. How much did Danielle spend on long distance?

If you would like to know how much did Danielle spend on a long distance, you can calculate this using the following steps:

C = $77.70 - $29.95 for a basic cell phone rate - $5.95 for voice mail - $2.95 for text messaging = 77.70 - 29.95 - 5.95 - 2.95 = $38.85 on a long distance

Danielle spent $38.85 on a long distance.