Question
Tommy used 84 straws to make a total of 20 triangles and pentagons. A triangle was made using 3 straws and a pentagon was made using 5 straws. How many pentagons were there?
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Tommy used 84 straws to make a total of 20 triangles and pentagons. A triangle was made using 3 straws and a pentagon was made using 5 straws. How many pentagons were there?