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