Cell phone company A charges $20 per month plus $0.05 per text message. Cell phone company B charges $10 per month plus 0.07 per
text message. Is there any number of text messages that will result in the exact same charge from both companies?
1 answer:
Answer:
Yes, 500 texts.
Step-by-step explanation:
If you write out the equations, you can just set them up equal to each other and simplify.
A = .05x + 20
B = .07x + 10
.05x + 20 = .07x + 10 (subtract 10 from both sides)
.05x + 10 = .07x (subtract .05x from both sides)
10 = .02x (multiply both sides by 50
x = 500 texts
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