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20 August, 11:06

A/7+1/4=5/6 solve for a

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  1. 20 August, 12:38
    0
    A/7+1/4=5/6

    a/7=4a/28

    1/4=7/28

    4a/28+7/28 = (4a+7) / 28

    (4a+7) / 28=5/6

    multiply both sides by 28

    4a+7=70/3=23 1/3

    subtract 7 from both sdies

    4a=16 and 1/3

    divde both sides by 4

    a=4 1/12
  2. 20 August, 14:18
    0
    12a / 84 + 21 / 84 = 70 / 84;

    (12 a + 21) / 84 = 70 / 84;

    12a + 21 = 70;

    12a = 49;

    a = 49 / 12;
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