Math (pre-algerbra)

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I've tried this sooo many times I have huge marks on my paper and I just can't figure it out:


  • Math (pre-algerbra) -

    multiply each term by 24

    9a - 2a + 84 = 168
    7a = 84
    a = 12

    I usually try to get rid of any fraction by multiplying each term by the LCD

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