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12 March, 07:40

Add 5 to me. Then divide by 7. If you add 12 and the subtract 7, you get 10

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  1. 12 March, 07:55
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    Answer: 30

    Step-by-step explanation:

    Let the number be y

    Add 5 to me

    Y+5 ... equ1

    Divide by 7

    Y+5/7

    Add 12

    Y+5/7+12

    Subtract 7

    (Y+5) / 7 + (12-7) = 10

    12-7=5

    Substitute

    (Y+5) / 7+5=10

    Find the lowest common multiple

    ((Y+5) + 7 (5)) / 7=10

    (Y+5) + 35) / 7=10

    Cross multiply

    Y+5+35=70

    Y+40=70

    Y=70-40

    Y=30

    The unknown number is 30
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