689  Stamp
How many stamps? 2

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There are 230 stamps which are 7-cent stamps and 9-cent stamps. Altogether they cost 1790 cents. How many 7-cent stamps are there?



There are 200 stamps which are 5-cent stamps and 4-cent stamps. Altogether they cost 900 cents. How many 5-cent stamps are there?



There are 190 stamps which are 5-cent stamps and 9-cent stamps. Altogether they cost 1150 cents. How many 5-cent stamps are there?



There are 170 stamps which are 6-cent stamps and 3-cent stamps. Altogether they cost 780 cents. How many 6-cent stamps are there?



There are 150 stamps which are 5-cent stamps and 9-cent stamps. Altogether they cost 950 cents. How many 5-cent stamps are there?



There are 210 stamps which are 7-cent stamps and 4-cent stamps. Altogether they cost 1200 cents. How many 7-cent stamps are there?



There are 220 stamps which are 4-cent stamps and 7-cent stamps. Altogether they cost 1090 cents. How many 4-cent stamps are there?



¿À´Ã 5¿øÂ¥¸® 6¿øÂ¥¸® ¿ìÇ¥ ÃÑ 200 ÀåÀ» »ç°í, 1090 ¿øÀ» ÁöºÒ ÇßÀ»¶§, ¸î°³ÀÇ 5¿øÂ¥¸® ¿ìÇ¥¸¦ »ò´Â°¡?



There are 200 stamps which are 6-cent stamps and 4-cent stamps. Altogether they cost 1080 cents. How many 6-cent stamps are there?



There are 270 stamps which are 3-cent stamps and 4-cent stamps. Altogether they cost 940 cents. How many 3-cent stamps are there?



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689    140 100 140 90 100 ( 570 )   120 150 110 140 140 ( 660 )   [[ 1230 ]]