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math

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-12d - 9= 15d+9

  • math -

    -12d - 9= 15d+9

    -12d + (-15d) = 9 + 9

    -27d = 18
    d = -18/27

    d = - 0.67

  • math -

    having problems with formulas, can you explain how you answered this problem ty

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