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gonzalesalexiaouv1bg
20.11.2020 •
Mathematics
Tony purchases 20 black pens along with some blue pens. He spends $155 in
total. The black pens cost $6 each and the black pens cost $5 each. If b
represents the number of blue pens, which of the following equations can be
used to determine how many blue pens Tony purchased?
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