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12 December, 22:07

If a bat and ball costs $1:10

And the bat costs $1 more than the ball

How much does the ball cost?

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Answers (1)
  1. 13 December, 00:11
    0
    X = bat, y = ball

    x + y = 1.10

    x = y + 1

    y + 1 + y = 1.10

    2y + 1 = 1.10

    2y = 1.10 - 1

    2y = 0.10

    y = 0.10/2

    y = 0.05 < = = = the ball

    x = y + 1

    x = 0.05 + 1

    x = 1.05 < = = the bat
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