math

Sam had a total of 80 foreign stamps and local stamps combined. After giving away 1/3 of his foreign stamps and 10 local stamps, he had an equal number of foreign stamps and local stamps left. How many local stamps did he have in the beginning?

asked by Chris
  1. f+l = 80
    2/3 f = l-10

    so,

    2/3(80-l) = l - 10
    160-2l = 3l-30
    190 = 5l
    l = 38

    check:
    initially there were
    38 local and 42 foreign
    after removing 10 local and 14 foreign, there were 28 of each.

    posted by Steve
  2. Where do you get 2/3rds from

    posted by Bell

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