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w in (-oo:+oo)
7-6*w = 3*w+52 // - 3*w+52
7-6*w-(3*w)-52 = 0
7-6*w-3*w-52 = 0
-9*w-45 = 0 // + 45
-9*w = 45 // : -9
w = 45/(-9)
w = -5
w = -5
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