-9/r-10=11

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Solution for -9/r-10=11 equation: 


D( r )

r = 0

r = 0

r = 0

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

-9/r-10 = 11 // - 11

-9/r-11-10 = 0

-9*r^-1 = 21 // : -9

r^-1 = -7/3

-1 < 0

1/(r^1) = -7/3 // * r^1

1 = -7/3*r^1 // : -7/3

-3/7 = r^1

r = -3/7

r = -3/7

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