27/81=r/9

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Solution for 27/81=r/9 equation:


r in (-oo:+oo)

27/81 = r/9 // - r/9

27/81-(r/9) = 0

1/3-1/9*r = 0 // - 1/3

-1/9*r = -1/3 // : -1/9

r = -1/3/(-1/9)

r = 3

r = 3

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