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w in (-oo:+oo)
5*w+3/4 = 23/4 // - 23/4
5*w+3/4-(23/4) = 0
5*w+3/4-23/4 = 0
5*w-5 = 0 // + 5
5*w = 5 // : 5
w = 5/5
w = 1
w = 1
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