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 = (1.35/2)*y // - (1.35/2)*y
x-((1.35/2)*y) = 0
x-0.675*y = 0
x-0.675*y = 0 // + -0.675*y
x = -(-0.675*y)
x = 0.675*y
x = 0.675*y
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