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d in (-oo:+oo)
(1/2)*(d-3)-((2/3)*(2*d-5)) = 5/12 // - 5/12
(1/2)*(d-3)-((2/3)*(2*d-5))-(5/12) = 0
(1/2)*(d-3)+(-2/3)*(2*d-5)-5/12 = 0
1/2*(d-3)-2/3*(2*d-5)-5/12 = 0
(1/2*12*(d-3))/12+(-2/3*12*(2*d-5))/12-5/12 = 0
1/2*12*(d-3)-2/3*12*(2*d-5)-5 = 0
22-10*d-5 = 0
17-10*d = 0
(17-10*d)/12 = 0
(17-10*d)/12 = 0 // * 12
17-10*d = 0
17-10*d = 0 // - 17
-10*d = -17 // : -10
d = -17/(-10)
d = 17/10
d = 17/10
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