X/9+8=-1 - solution

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Solution for X/9+8=-1 equation:

X in (-oo:+oo)

X/9+8 = -1 // + 1

X/9+1+8 = 0

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

1/9*X = -9 // : 1/9

X = -9/1/9

X = -81

X = -81

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