7/13=r/5

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Solution for 7/13=r/5 equation: 


r in (-oo:+oo)

7/13 = r/5 // - r/5

7/13-(r/5) = 0

7/13-1/5*r = 0 // - 7/13

-1/5*r = -7/13 // : -1/5

r = -7/13/(-1/5)

r = 35/13

r = 35/13

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