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w in (-oo:+oo)
103/6 = w+(2/3)*w+1/2 // - w+(2/3)*w+1/2
103/6-w-((2/3)*w)-(1/2) = 0
(-2/3)*w-w+103/6-1/2 = 0
50/3-5/3*w = 0 // - 50/3
-5/3*w = -50/3 // : -5/3
w = -50/3/(-5/3)
w = 10
w = 10
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