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17 September, 13:24

Solve for b A = / frac{a+b}{2}

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  1. 17 September, 13:51
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    A = (a+b) / 2

    2*A = 2 * (a+b) / 2 ... multiply both sides by 2

    2A = a+b

    2A-a = a+b-a ... subtract 'a' from both sides to isolate b

    2A-a = b

    b = 2A-a

    Answer: b = 2A-a
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