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)
x/y = k // - k
x/y-k = 0
x*y^-1-k = 0 // + k
x*y^-1 = k // : y^-1
x = k/(y^-1)
x = k/(y^-1)
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