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z in (-oo:+oo)
(-1/2)*(z+1/9) = (-3/8)*(z+1/2) // - (-3/8)*(z+1/2)
(-1/2)*(z+1/9)-((-3/8)*(z+1/2)) = 0
(-1/2)*(z+1/9)+(3/8)*(z+1/2) = 0
3/8*(z+1/2)-1/2*(z+1/9) = 0
3/8*(z+1/2)-1/2*(z+1/9) = 0
19/144-1/8*z = 0
19/144-1/8*z = 0
19/144-1/8*z = 0 // - 19/144
-1/8*z = -19/144 // : -1/8
z = -19/144/(-1/8)
z = 19/18
z = 19/18
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