574  Stamp
How many stamps? 2

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There are 220 stamps which are 8-cent stamps and 3-cent stamps. Altogether they cost 1160 cents. How many 8-cent stamps are there?



There are 150 stamps which are 7-cent stamps and 4-cent stamps. Altogether they cost 840 cents. How many 7-cent stamps are there?



There are 170 stamps which are 4-cent stamps and 5-cent stamps. Altogether they cost 730 cents. How many 4-cent stamps are there?



There are 200 stamps which are 7-cent stamps and 3-cent stamps. Altogether they cost 960 cents. How many 7-cent stamps are there?



There are 230 stamps which are 5-cent stamps and 6-cent stamps. Altogether they cost 1230 cents. How many 5-cent stamps are there?



There are 170 stamps which are 7-cent stamps and 9-cent stamps. Altogether they cost 1330 cents. How many 7-cent stamps are there?



There are 130 stamps which are 6-cent stamps and 3-cent stamps. Altogether they cost 630 cents. How many 6-cent stamps are there?



¿À´Ã 4¿øÂ¥¸® 7¿øÂ¥¸® ¿ìÇ¥ ÃÑ 220 ÀåÀ» »ç°í, 1180 ¿øÀ» ÁöºÒ ÇßÀ»¶§, ¸î°³ÀÇ 4¿øÂ¥¸® ¿ìÇ¥¸¦ »ò´Â°¡?



There are 190 stamps which are 7-cent stamps and 5-cent stamps. Altogether they cost 1090 cents. How many 7-cent stamps are there?



There are 160 stamps which are 8-cent stamps and 6-cent stamps. Altogether they cost 1120 cents. How many 8-cent stamps are there?



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574    100 80 120 90 150 ( 540 )   100 80 120 70 80 ( 450 )   [[ 990 ]]