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520 Stamp |
Name : _________________ |
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There are 160 stamps which are 7-cent stamps and 5-cent stamps. Altogether they cost 1000 cents. How many 7-cent stamps are there? |
There are 200 stamps which are 6-cent stamps and 7-cent stamps. Altogether they cost 1280 cents. How many 6-cent stamps are there? |
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| 520 100 100 110 110 110 ( 530 ) 120 70 100 100 110 ( 500 ) [[ 1030 ]] | ||
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