-1/9r=9

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Solution for -1/9r=9 equation: 


r in (-oo:+oo)

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

(-1/9)*r-9 = 0

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

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

r = 9/(-1/9)

r = -81

r = -81

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