If it's not what You are looking for type in the equation solver your own equation and let us solve it.
x in (-oo:+oo)
-9*x = 1/9 // - 1/9
-9*x-(1/9) = 0
-9*x-1/9 = 0
-9*x-1/9 = 0 // + 1/9
-9*x = 1/9 // : -9
x = 1/9/(-9)
x = -1/81
x = -1/81
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