8th grade

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I need help on this equation:

  • 8th grade -


    15n - 20 - 12 = 13
    15n - 32 = 13
    15n = 13 + 32
    15n = 45
    n = ?

  • 8th grade -


    Add 12 to both sides:


    Divide across by 5:

    3n - 4 = 5

    Add 4 to both sides:

    (you fill this in)

    Finally, divide across by 3:

    (you fill this in too!)

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