-w/2=9

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Solution for -w/2=9 equation: 


w in (-oo:+oo)

-w/2 = 9 // - 9

-w/2-9 = 0

-1/2*w-9 = 0 // + 9

-1/2*w = 9 // : -1/2

w = 9/(-1/2)

w = -18

w = -18

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