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d in (-oo:+oo)
(1/3)*(d-8)-((5/2)*(5*d-3)) = 15/12 // - 15/12
(1/3)*(d-8)-((5/2)*(5*d-3))-(15/12) = 0
(1/3)*(d-8)+(-5/2)*(5*d-3)-5/4 = 0
1/3*(d-8)-5/2*(5*d-3)-5/4 = 0
(1/3*4*(d-8))/4+(-5/2*4*(5*d-3))/4-5/4 = 0
1/3*4*(d-8)-5/2*4*(5*d-3)-5 = 0
58/3-146/3*d-5 = 0
43/3-146/3*d = 0
(43/3-146/3*d)/4 = 0
(43/3-146/3*d)/4 = 0 // * 4
43/3-146/3*d = 0
43/3-146/3*d = 0 // - 43/3
-146/3*d = -43/3 // : -146/3
d = -43/3/(-146/3)
d = 43/146
d = 43/146
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