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w in (-oo:+oo)
5*w+(2/5)*w-8 = 149/5 // - 149/5
5*w+(2/5)*w-(149/5)-8 = 0
5*w+(2/5)*w-149/5-8 = 0
27/5*w-189/5 = 0 // + 189/5
27/5*w = 189/5 // : 27/5
w = 189/5/27/5
w = 7
w = 7
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