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w in (-oo:+oo)
3*w+8 = 4*w-2 // - 4*w-2
3*w-(4*w)+2+8 = 0
3*w-4*w+2+8 = 0
10-w = 0 // - 10
-w = -10 // * -1
w = 10
w = 10
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