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w in (-oo:+oo)
(1/3)*w-2 = -8/3 // + -8/3
(1/3)*w-(-8/3)-2 = 0
(1/3)*w+8/3-2 = 0
1/3*w+2/3 = 0 // - 2/3
1/3*w = -2/3 // : 1/3
w = -2/3/1/3
w = -2
w = -2
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