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w in (-oo:+oo)
(3/4)*(12*w-8) = 12 // - 12
(3/4)*(12*w-8)-12 = 0
3/4*(12*w-8)-12 = 0
3/4*(12*w-8)-12 = 0
9*w-18 = 0
9*w-18 = 0
9*w-18 = 0 // + 18
9*w = 18 // : 9
w = 18/9
w = 2
w = 2
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