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14 February, 08:37

Solve A=p+prt for r.

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  1. 14 February, 09:22
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    A = p + prt

    The above equation can be solved for "r" in such a way.

    Subtract "p" from both sides;

    A - p = p + prt - p

    A - p = prt

    Divide both sides by "p" and "t";

    A/pt - p/pt = prt/pt

    A/pt - 1/t = r

    Or

    r = A/pt - 1/t
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