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y in (-oo:+oo)
(-3/8)*(y+1/9) = (1/8)*(y+2/3) // - (1/8)*(y+2/3)
(-3/8)*(y+1/9)-((1/8)*(y+2/3)) = 0
(-3/8)*(y+1/9)+(-1/8)*(y+2/3) = 0
-3/8*(y+1/9)-1/8*(y+2/3) = 0
-3/8*(y+1/9)-1/8*(y+2/3) = 0
-1/2*y-1/8 = 0
-1/2*y-1/8 = 0
-1/2*y-1/8 = 0 // + 1/8
-1/2*y = 1/8 // : -1/2
y = 1/8/(-1/2)
y = -1/4
y = -1/4
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