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)
(-1/3)*y = 3.75 // - 3.75
(-1/3)*y-3.75 = 0
-1/3*y-3.75 = 0 // + 3.75
-1/3*y = 3.75 // : -1/3
y = 3.75/(-1/3)
y = -11.25000011
y = -11.25000011
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