140  Stamp
How many stamps? 2

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There are 220 stamps which are 4-cent stamps and 9-cent stamps. Altogether they cost 1230 cents. How many 4-cent stamps are there?



There are 250 stamps which are 4-cent stamps and 8-cent stamps. Altogether they cost 1480 cents. How many 4-cent stamps are there?



There are 220 stamps which are 5-cent stamps and 8-cent stamps. Altogether they cost 1340 cents. How many 5-cent stamps are there?



There are 220 stamps which are 4-cent stamps and 9-cent stamps. Altogether they cost 1530 cents. How many 4-cent stamps are there?



There are 190 stamps which are 5-cent stamps and 9-cent stamps. Altogether they cost 1190 cents. How many 5-cent stamps are there?



There are 270 stamps which are 5-cent stamps and 7-cent stamps. Altogether they cost 1610 cents. How many 5-cent stamps are there?



There are 240 stamps which are 5-cent stamps and 9-cent stamps. Altogether they cost 1560 cents. How many 5-cent stamps are there?



¿À´Ã 4¿øÂ¥¸® 3¿øÂ¥¸® ¿ìÇ¥ ÃÑ 150 ÀåÀ» »ç°í, 550 ¿øÀ» ÁöºÒ ÇßÀ»¶§, ¸î°³ÀÇ 4¿øÂ¥¸® ¿ìÇ¥¸¦ »ò´Â°¡?



There are 150 stamps which are 7-cent stamps and 6-cent stamps. Altogether they cost 970 cents. How many 7-cent stamps are there?



There are 200 stamps which are 5-cent stamps and 9-cent stamps. Altogether they cost 1240 cents. How many 5-cent stamps are there?



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