r/9=-8

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Solution for r/9=-8 equation: 


r in (-oo:+oo)

r/9 = -8 // + 8

r/9+8 = 0

1/9*r+8 = 0 // - 8

1/9*r = -8 // : 1/9

r = -8/1/9

r = -72

r = -72

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