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w in (-oo:+oo)
3/4-((2/3)*w) = 7/36 // - 7/36
3/4-((2/3)*w)-(7/36) = 0
(-2/3)*w+3/4-7/36 = 0
5/9-2/3*w = 0 // - 5/9
-2/3*w = -5/9 // : -2/3
w = -5/9/(-2/3)
w = 5/6
w = 5/6
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