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w in (-oo:+oo)
6*(7*w-8) = 372 // - 372
6*(7*w-8)-372 = 0
6*(7*w-8)-372 = 0
42*w-420 = 0
42*w-420 = 0
42*w-420 = 0 // + 420
42*w = 420 // : 42
w = 420/42
w = 10
w = 10
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