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John is buying fencing for his yard. He pays $122 for 5 fence boards and 4 fence panels. He pays $570 for 21 fence boards and 20 fence panels. How much does one fence board cost? How much does he pay for
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John is buying fencing for his yard. He pays $122 for 5 fence boards and 4 fence panels. He pays $570 for 21 fence boards and 20 fence panels. How much does one fence board cost? How much does he pay for 3 fence panels?

User SGC
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it is 24 dollars and 40 cents $24.40 because you just divide 122 by 5 and you get 24.4 and then you multiply 24.40 times 3 and you will get $73.20 
User Erik Bergsten
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