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w in (-oo:+oo)
(-3/4)*w-7 = -79/12 // + -79/12
(-3/4)*w-(-79/12)-7 = 0
(-3/4)*w+79/12-7 = 0
-3/4*w-5/12 = 0 // + 5/12
-3/4*w = 5/12 // : -3/4
w = 5/12/(-3/4)
w = -5/9
w = -5/9
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