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w in (-oo:+oo)
6*w-4 = 2*w+24 // - 2*w+24
6*w-(2*w)-24-4 = 0
6*w-2*w-24-4 = 0
4*w-28 = 0 // + 28
4*w = 28 // : 4
w = 28/4
w = 7
w = 7
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