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)
y = -2*x-(3/2) // + -2*x-(3/2)
y-(-2*x)+3/2 = 0
2*x+y+3/2 = 0
2*x+y+3/2 = 0 // - y+3/2
2*x = -(y+3/2) // : 2
x = (-(y+3/2))/2
x = (-(y+3/2))/2
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