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w in (-oo:+oo)
(6/7)*w+5*w+3/4 = 1543/308 // - 1543/308
(6/7)*w+5*w+3/4-(1543/308) = 0
(6/7)*w+5*w+3/4-1543/308 = 0
41/7*w-328/77 = 0 // + 328/77
41/7*w = 328/77 // : 41/7
w = 328/77/41/7
w = 8/11
w = 8/11
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