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Mathematics 8 Online
OpenStudy (anonymous):

(S)=(4/r) for r

OpenStudy (anonymous):

multiply r by both sides

OpenStudy (anonymous):

rS=4 ...so can you solve it from there?

OpenStudy (anonymous):

r=(4/S)

OpenStudy (anonymous):

\[ S=\frac4r\\ Sr=4\\ r=\frac{4}S\\ \]

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