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w in (-oo:+oo)
2*(4*w+6) = 36 // - 36
2*(4*w+6)-36 = 0
2*(4*w+6)-36 = 0
8*w-24 = 0
8*w-24 = 0
8*w-24 = 0 // + 24
8*w = 24 // : 8
w = 24/8
w = 3
w = 3
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