12/7=11/r

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Solution for 12/7=11/r equation: 


D( r )

r = 0

r = 0

r = 0

r in (-oo:0) U (0:+oo)

12/7 = 11/r // - 11/r

12/7-(11/r) = 0

12/7-11*r^-1 = 0

-11*r^-1 = -12/7 // : -11

r^-1 = 12/77

-1 < 0

1/(r^1) = 12/77 // * r^1

1 = 12/77*r^1 // : 12/77

77/12 = r^1

r = 77/12

r = 77/12

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