Question:
A pencil costs y cents and a file costs 40 cents more than a pencil.
(a) What is the cost of 2 identical files and 3 identical pencils in cents? Express your answer in terms of y in the simplest form.
(b) Shernice wants to buy 2 such files and 3 such pencils but is short of 30 cents. If the pencil costs 90 cents, how much money does Shernice have?
Solution:
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