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There are 200 stamps which are 7-cent stamps and 6-cent stamps. Altogether they cost 1330 cents. How many 7-cent stamps are there?
There are 170 stamps which are 4-cent stamps and 7-cent stamps. Altogether they cost 920 cents. How many 4-cent stamps are there?
There are 210 stamps which are 7-cent stamps and 5-cent stamps. Altogether they cost 1250 cents. How many 7-cent stamps are there?
There are 190 stamps which are 6-cent stamps and 8-cent stamps. Altogether they cost 1240 cents. How many 6-cent stamps are there?
There are 180 stamps which are 4-cent stamps and 7-cent stamps. Altogether they cost 960 cents. How many 4-cent stamps are there?
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There are 240 stamps which are 6-cent stamps and 9-cent stamps. Altogether they cost 1800 cents. How many 6-cent stamps are there?
There are 260 stamps which are 7-cent stamps and 5-cent stamps. Altogether they cost 1600 cents. How many 7-cent stamps are there?
¿À´Ã 7¿øÂ¥¸® 9¿øÂ¥¸® ¿ìÇ¥ ÃÑ 150 ÀåÀ» »ç°í, 1150 ¿øÀ» ÁöºÒ ÇßÀ»¶§, ¸î°³ÀÇ 7¿øÂ¥¸® ¿ìÇ¥¸¦ »ò´Â°¡?
There are 150 stamps which are 6-cent stamps and 5-cent stamps. Altogether they cost 850 cents. How many 6-cent stamps are there?
There are 200 stamps which are 7-cent stamps and 9-cent stamps. Altogether they cost 1580 cents. How many 7-cent stamps are there?
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