Question

Cell Phone Company A charges $20 each month plus $0.03 per text. Cell Phone Company B charges $5 each month plus $0.07 per text.

Write a system of equations to model the situation using c for cost and t for number of texts.
How many texts does a person need to send in a month to make the costs from both companies equal?

Answer 1

ur equations are :
C = 0.03t + 20...this is company A
C = 0.07t + 5....this is company B

now...for them to be equal...set them equal and solve for t
0.03t + 20 = .07t + 5
-5 + 20 = 0.07t - 0.03t
15 = 0.04t
15/0.04 = t
375 = t.......there would have to be 375 texts