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w in (-oo:+oo)
(-4/3)*w-7 = (1/4)*w-(7/2) // - (1/4)*w-(7/2)
(-4/3)*w-((1/4)*w)+7/2-7 = 0
(-4/3)*w+(-1/4)*w+7/2-7 = 0
-19/12*w-7/2 = 0 // + 7/2
-19/12*w = 7/2 // : -19/12
w = 7/2/(-19/12)
w = -42/19
w = -42/19
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