Question

Jeannie has a cell phone plan that charges $60 per month. It includes unlimited calling but

only the first 500 text messages are free, For every extra text message that Jeannie sends,
she must pay $0.15. If Jeannie's bill at the end of a month is $70.80, how many extra text
messages did she send/receive?

Answer 1

Jeannie sent/received 572 text messages

Explanation:

60$ are payed at the beginning

0.15$ is payed for every extra text.

the total is 70.80$

if t is the number of extra text messages, then

60 + 0.15t = 70.80

subtract 60 from both sides

0.15t = 70.80 - 60

0.15t = 10.80

divide both sides by 0.15

t = 10.80/0.15

t = 72

remember, Jeannie was able to send 500 free texts at the beginning.

so, her total texts would be 572

let me know if I did something wrong!