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