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w in (-oo:+oo)
(1/3)*w-(3/8) = w-145/216 // - w-145/216
(1/3)*w-w-(3/8)-(-145/216) = 0
(1/3)*w-w-3/8+145/216 = 0
8/27-2/3*w = 0 // - 8/27
-2/3*w = -8/27 // : -2/3
w = -8/27/(-2/3)
w = 4/9
w = 4/9
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