-x/2=9

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Solution for -x/2=9 equation: 


x in (-oo:+oo)

-x/2 = 9 // - 9

-x/2-9 = 0

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

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

x = 9/(-1/2)

x = -18

x = -18

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