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Peter has twice many stickers as Ali. Ali has 40 more stickers than Carlos. They have 300 stickers altogether. How many stickers does Peter have?

  • math -

    Let c be the number of stickers that Carlos has.

    c + c + 40 + 2c + 40 = 300

    4c = 220

    c = 55

  • math -

    That's not right. c does not equal 55.

    Peter - 2 x c
    Ali - Has c + another 40
    Carlos - c

    (2c) + (c + 40) + (c)
    = 4c + 40 = 300
    = 4c = 300-40
    = 4c = 260
    = 4c / 4 = 260 / 4
    = 0 = 65
    c = 65

    Feel free to correct me if I'm wrong.

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