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156 Stamp |
Name : _________________ |
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There are 270 stamps which are 7-cent stamps and 9-cent stamps. Altogether they cost 2130 cents. How many 7-cent stamps are there? |
There are 250 stamps which are 6-cent stamps and 5-cent stamps. Altogether they cost 1380 cents. How many 6-cent stamps are there? |
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| 156 150 70 80 140 120 ( 560 ) 130 100 110 130 140 ( 610 ) [[ 1170 ]] | ||
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