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A teacher had 21 red pens. If the ratio of red pens to blue pens she owned was 3:1, how many pens did she have total?
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A teacher had 21 red pens. If the ratio of red pens to blue pens she owned was 3:1, how many pens did she have total?
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Nov 25, 2016
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A teacher had 21 red pens. If the ratio of red pens to blue pens she owned was 3:1, how many pens did she have total?
Mathematics
middle-school
Venomy
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x - blue pens
28 in total
Sybind
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Nov 29, 2016
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Sybind
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