212  Stamp
How many stamps? 2

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There are 170 stamps which are 4-cent stamps and 7-cent stamps. Altogether they cost 980 cents. How many 4-cent stamps are there?



There are 140 stamps which are 4-cent stamps and 3-cent stamps. Altogether they cost 510 cents. How many 4-cent stamps are there?



There are 180 stamps which are 3-cent stamps and 5-cent stamps. Altogether they cost 720 cents. How many 3-cent stamps are there?



There are 230 stamps which are 8-cent stamps and 4-cent stamps. Altogether they cost 1520 cents. How many 8-cent stamps are there?



There are 180 stamps which are 3-cent stamps and 8-cent stamps. Altogether they cost 890 cents. How many 3-cent stamps are there?



There are 180 stamps which are 8-cent stamps and 9-cent stamps. Altogether they cost 1550 cents. How many 8-cent stamps are there?



There are 180 stamps which are 7-cent stamps and 6-cent stamps. Altogether they cost 1190 cents. How many 7-cent stamps are there?



¿À´Ã 7¿øÂ¥¸® 6¿øÂ¥¸® ¿ìÇ¥ ÃÑ 170 ÀåÀ» »ç°í, 1090 ¿øÀ» ÁöºÒ ÇßÀ»¶§, ¸î°³ÀÇ 7¿øÂ¥¸® ¿ìÇ¥¸¦ »ò´Â°¡?



There are 230 stamps which are 8-cent stamps and 5-cent stamps. Altogether they cost 1450 cents. How many 8-cent stamps are there?



There are 200 stamps which are 3-cent stamps and 5-cent stamps. Altogether they cost 780 cents. How many 3-cent stamps are there?



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212    70 90 90 150 110 ( 510 )   70 110 70 100 110 ( 460 )   [[ 970 ]]