X/3+9=-1 - solution

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Solution for X/3+9=-1 equation:

X in (-oo:+oo)

X/3+9 = -1 // + 1

X/3+1+9 = 0

1/3*X+10 = 0 // - 10

1/3*X = -10 // : 1/3

X = -10/1/3

X = -30

X = -30

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