If it's not what You are looking for type in the equation solver your own equation and let us solve it.
f in (-oo:+oo)
(1/2)*f = (1/6)*f // - (1/6)*f
(1/2)*f-((1/6)*f) = 0
(1/2)*f+(-1/6)*f = 0
1/3*f = 0 // : 1/3
f = 0
f = 0
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