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Math

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Sarah bought 8 folders and 3 rulers. Lea bought 8 rulers and 3 folders. Sarah paid $1.25 more than Lea. How much was each folder if each ruler was .45 cents

  • Math - ,

    8f+3r = 8r+3f + 1.25
    now plug in r=.45 to get
    8f+1.35 = 3.60+3f+1.25
    5f = 3.50
    f = .70

    check:
    8*.70+3*.45 = 6.95
    3*.70+8*.45 = 5.70
    difference is 1.25

  • Math - ,

    .70

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