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Mathematics 19 Online
OpenStudy (carlyxphan):

You have 21 pencils on your desk. You have 3 more pens than pencils. Write a system of linear equations that represents this situation.

OpenStudy (wilsondanielle):

Let y be the number of pens you have and x be the number of pencils. The first one will be x = 21 because you have 21 pencils. What transformation needs to occur for x to be equal to y?

OpenStudy (carlyxphan):

Um I'm not sure

OpenStudy (mathmale):

Please represent the number of pens and the number of pencils with appropriate letters (e. g., x and y. Another way of asking wilsondanielle's question: How would you represent the number of pens in terms of x?

OpenStudy (carlyxphan):

x+y=21?

OpenStudy (wilsondanielle):

That would help if the SUM of pens AND pencils was 21. Is it just the pencils that equal 21 or both the pens and the pencils?

OpenStudy (mathmale):

You aren't required to find the actual number of pens, 'tho it'd be nice if you did so. All you are asked to do in this problem is to express the number of pens algebraically.

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