If it's not what You are looking for type in the equation solver your own equation and let us solve it.
y in (-oo:+oo)
y/0.25 = 9 // - 9
y/0.25-9 = 0
4*y-9 = 0 // + 9
4*y = 9 // : 4
y = 9/4
y = 9/4
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