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d in (-oo:+oo)
(-2*d)/3+3 = 11 // - 11
(-2*d)/3-11+3 = 0
-2/3*d-8 = 0 // + 8
-2/3*d = 8 // : -2/3
d = 8/(-2/3)
d = -12
d = -12
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