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 = x/2-2 // - x/2-2
y-(x/2)+2 = 0
y-1/2*x+2 = 0 // - y+2
-1/2*x = -(y+2) // : -1/2
x = (-(y+2))/(-1/2)
x = 2*(y+2)
x = 2*(y+2)
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