802  Stamp
How many stamps? 1

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There are 200 stamps which are 7-cent stamps and 3-cent stamps. Altogether they cost 1120 cents. How many 7-cent stamps are there?



There are 210 stamps which are 8-cent stamps and 4-cent stamps. Altogether they cost 1160 cents. How many 8-cent stamps are there?



There are 120 stamps which are 7-cent stamps and 3-cent stamps. Altogether they cost 640 cents. How many 7-cent stamps are there?



There are 260 stamps which are 4-cent stamps and 7-cent stamps. Altogether they cost 1370 cents. How many 4-cent stamps are there?



There are 210 stamps which are 3-cent stamps and 4-cent stamps. Altogether they cost 760 cents. How many 3-cent stamps are there?



There are 140 stamps which are 6-cent stamps and 5-cent stamps. Altogether they cost 780 cents. How many 6-cent stamps are there?



There are 200 stamps which are 8-cent stamps and 9-cent stamps. Altogether they cost 1690 cents. How many 8-cent stamps are there?



There are 170 stamps which are 3-cent stamps and 9-cent stamps. Altogether they cost 810 cents. How many 3-cent stamps are there?



There are 220 stamps which are 5-cent stamps and 9-cent stamps. Altogether they cost 1500 cents. How many 5-cent stamps are there?



There are 220 stamps which are 3-cent stamps and 7-cent stamps. Altogether they cost 980 cents. How many 3-cent stamps are there?



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802    130 80 70 150 80 ( 510 )   80 110 120 120 140 ( 570 )   [[ 1080 ]]