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?

Let the number of text messages be represented by X.

Then the total cost of David's cell phone adds up to


Since the total cost of David's phone equals $91.40, we get the following equation.


Subtract 50 on both sides


Divide both sides by 0.45


Therefore David has send 92 text messages.

4should be the last one n=4

Iam not sure , but probably 750 or 7.5