d/2+11=9

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Solution for d/2+11=9 equation: 


d in (-oo:+oo)

d/2+11 = 9 // - 9

d/2-9+11 = 0

1/2*d+2 = 0 // - 2

1/2*d = -2 // : 1/2

d = -2/1/2

d = -4

d = -4

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