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