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w in (-oo:+oo)
-135 = 5*w+7*w-3 // - 5*w+7*w-3
3-(5*w)-(7*w)-135 = 0
3-5*w-7*w-135 = 0
-12*w-132 = 0 // + 132
-12*w = 132 // : -12
w = 132/(-12)
w = -11
w = -11
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