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5 October, 18:37

An apple has 24 fewer calories than a banana. If 7 bananas have the same number of calories as 10 apples, how many calories are in a banana

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  1. 5 October, 22:16
    0
    If apple is x and banana is y

    y-24=x

    7y=10x=>7 (x-24) = 10x=>10x-7x=168=>3x=168=>x=56 so y=80 so banana's calories is 80
  2. 5 October, 22:17
    0
    Substitute for "a" and solve for "b":

    7b = 10 (b-24)

    7b = 10b-240

    3b = 240

    b = 80 (# of calories in a banana)
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