Acell phone carrier offers two plans for text messaging. plan a costs $20 per month plus $0.05 per text. plan b costs $10 per month plus $0.10 per text. for how many text messages per month are the plans the same cost?

For the answer to the question above,Let C-cost
Let n- the number of text messages

c=20+0.05n
c=10+0.10n

When cost is same;
20+0.05n=10+0.10n
20-10=0.10n-0.05n
10=0.05n

10/.05

n=200
Cost is same when 200 messages are sent.

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