20=w/2+9

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Solution for 20=w/2+9 equation: 


w in (-oo:+oo)

20 = w/2+9 // - w/2+9

20-(w/2)-9 = 0

11-1/2*w = 0 // - 11

-1/2*w = -11 // : -1/2

w = -11/(-1/2)

w = 22

w = 22

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