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14 October, 18:17

Justine evaluated this expression for a certain value of s and got 13. What was the value of s?

15 + s / 3 - 6

+3
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  1. 14 October, 18:45
    0
    15+s / 3-6 simplify to 15+s / - 3

    Set that equal to 13 because it's the solution.

    15+s / - 3 = 13

    Multiply both sides by - 3.

    15+s = - 39

    Subtract 15.

    s = - 54
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