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12 November, 11:12

S=a + (n-1) d, solve for d

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  1. 12 November, 11:40
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    Answer:/frac{s-a}{n-1}

    Step-by-step explanation:

    formula, s=a + (n-1) d

    1. get rid of the a on d's side by subtracting it from both sides.

    s=a + (n-1) d becomes s-a = (n-1) d

    2. get rid of (n-1) by dividing it from both sides. s-a = (n-1) d becomes

    /frac{s-a}{n-1} = d
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