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w in (-oo:+oo)
2*(4*w+3) = 38 // - 38
2*(4*w+3)-38 = 0
2*(4*w+3)-38 = 0
8*w-32 = 0
8*w-32 = 0
8*w-32 = 0 // + 32
8*w = 32 // : 8
w = 32/8
w = 4
w = 4
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