Question
Justin used 70 straws to make a total of 12 pentagons and heptagons. A pentagon was made using 5 straws and a heptagon was made using 7 straws. How many heptagons were there?
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Justin used 70 straws to make a total of 12 pentagons and heptagons. A pentagon was made using 5 straws and a heptagon was made using 7 straws. How many heptagons were there?