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 = -0.75*(-3/4)-3 // + -0.75*(-3/4)-3
Y-(-0.75*(-3/4))+3 = 0
Y-0.5625+3 = 0
Y+2.4375 = 0 // - 2.4375
Y = -2.4375
Y = -2.4375
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