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