Word Problem:
David bought a total of 20 pens and pencils for school. If the number of pens he bought is represented by x and the number of pencils by y, and he bought twice as many pens as pencils, which equation represents the situation?
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𝑥+𝑦=20
𝑥=2𝑦
𝑥−𝑦=20
2𝑥=𝑦
1 answer
2x = y