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31 August, 09:51

What is the missing value in the equation

2 3/12+3/? = 2 5/8

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  1. 31 August, 10:17
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    2 3/12 + 3/x = 2 5/8

    simplify to

    9x+12/4x = 21/8

    Cross multiply

    (9x+12) / (4x) = 21/8

    (9x+12) * (8) = 21*4x

    72x+96 = 84x

    Subtract 84 x from both side

    72x+96 - 84x = 84x - 84x

    -12x+96 = 0

    Subtract 96 from both sides

    -12x+96-96 = 0-96

    -12x = - 96

    Divide both sides by 12

    -12x/-12 = - 96/-12

    x = 8

    The missing value is 8
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