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26 October, 11:17

How to solve this problem: 1 1/2 (n-4 1/2) = 12

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  1. 26 October, 11:31
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    n = 25/2, or n = 12 1/2

    Step-by-step explanation:

    It's essential that you use parentheses here to show how your numerals are grouped. I have made some assumptions here, and believe you meant:

    (1 1/2) (n - 4 1/2) = 12.

    First, convert 1 1/2 and 4 1/2 into improper fractions:

    (3/2) (n - 9/2) = 12

    Multiplying both sides by (2/3) eliminates the fractional coefficient (3/2):

    n - 9/2 = (2/3) (12), or n - 9/2 = 8.

    Again, eliminate the fraction by multiplying all terms by 2:

    2n - 9 = 16

    Then 2n = 25, and n = 25/2, or n = 12 1/2
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