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22 February, 22:13

Nine fewer than half a number is five more than four times the number. Define a variable, write an equation, and solve to find the number.

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  1. 23 February, 00:03
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    N = the number

    0.5n - 9 = 4n + 5

    (0.5n - 0.5n) - 9 = (4n - 0.5n) + 5

    -9 = 3.5n + 5

    (-9 - 5) = 3.5n + (5 - 5)

    -14 = 3.5n

    -14/3.5 = 3.5n/3.5

    -4 = n

    The number is - 4.
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