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w in (-oo:+oo)
w-(4*w)+8 = 26 // - 26
w-(4*w)-26+8 = 0
w-4*w-26+8 = 0
-3*w-18 = 0 // + 18
-3*w = 18 // : -3
w = 18/(-3)
w = -6
w = -6
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