Question

David's cell phone company charges $0.45 for| each text message plus a monthly fee of $50.00. He owes $91.40. Write and solve an equation to find the number of text messages did David has?

Answer 1

Let the number of text messages be represented by X.

Then the total cost of David's cell phone adds up to
$50.00 + 0.45x$

Since the total cost of David's phone equals $91.40, we get the following equation.
$50.00 + 0.45x = 91.40$

Subtract 50 on both sides
$0.45x = 41.40$

Divide both sides by 0.45
$x = 92$

Therefore David has send 92 text messages.