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