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y in (-oo:+oo)
y = (-6/5)*y-(13/20) // - (-6/5)*y-(13/20)
y-((-6/5)*y)+13/20 = 0
y+(6/5)*y+13/20 = 0
11/5*y+13/20 = 0 // - 13/20
11/5*y = -13/20 // : 11/5
y = -13/20/11/5
y = -13/44
y = -13/44
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