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 = (-1/4)*x // - (-1/4)*x
y-((-1/4)*x) = 0
(1/4)*x+y = 0
1/4*x+y = 0 // - y
1/4*x = -y // : 1/4
x = -y/1/4
x = -4*y
x = -4*y
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