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d in (-oo:+oo)
(1/4)*d-(2/5) = (3/4)*d+11 // - (3/4)*d+11
(1/4)*d-((3/4)*d)-(2/5)-11 = 0
(1/4)*d+(-3/4)*d-2/5-11 = 0
-1/2*d-57/5 = 0 // + 57/5
-1/2*d = 57/5 // : -1/2
d = 57/5/(-1/2)
d = -114/5
d = -114/5
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