why (solve) command, isn't true in this program ?

a1 =259006036996607113/2748779069440000 - (47*A2)/10000 - (19*A3)/25000 - (121*A4)/5000 - (29*A5)/2000 - (229*A6)/100000 - (383*A7)/10000 - (243*A8)/10000 - (363*A9)/100000 - (123*A10)/2500 - (63*A11)/2000 - (9*A12)/2000 - (41*A1)/5000

 a2 =(37*A2)/5000 - (9*A1)/1250 + (31*A3)/50000 - (209*A4)/10000 + (9*A5)/400 + (37*A6)/20000 - (159*A7)/5000 + (183*A8)/5000 + (9*A9)/3125 - (181*A10)/5000 + (93*A11)/2000 + (69*A12)/20000 + 8285662883594331/85899345920000

a3 =(13*A1)/5000 + (57*A2)/10000 - (171*A3)/100000 + (9*A4)/1250 + (17*A5)/1000 - (99*A6)/20000 + (19*A7)/2000 + (243*A8)/10000 - (19*A9)/2500 + (13*A10)/2500 + (277*A11)/10000 - (937*A12)/100000 - 70639590402038567/1374389534720000

a4 =(529*A10)/10000 - (69*A2)/10000 - (87*A3)/50000 - (491*A4)/10000 - A5/80 - (319*A6)/100000 - (23*A7)/2500 - (7*A8)/2000 - (51*A9)/50000 - (287*A1)/10000 + (8*A11)/625 + (57*A12)/20000 + 2443477941722838643/687194767360000

a5 =A2/40 - (121*A1)/10000 + (63*A3)/25000 - (199*A4)/10000 + (447*A5)/10000 + (87*A6)/20000 - (11*A7)/5000 + (29*A8)/2500 + (77*A9)/100000 + (197*A10)/10000 - (59*A11)/1250 - (93*A12)/20000 + 597546345909810561/343597383680000

a6 =(69*A1)/10000 + (157*A2)/10000 - (211*A3)/50000 + A4/100 + (273*A5)/10000 - (141*A6)/20000 - (11*A7)/10000 + (51*A8)/10000 - (49*A9)/50000 - (3*A10)/400 - (299*A11)/10000 + (977*A12)/100000 - 83817552286622439/68719476736000

a7 =(53*A7)/1000 - (7*A2)/2500 - (11*A3)/10000 - (47*A4)/5000 - A5/2000 - (41*A6)/100000 - (247*A1)/5000 + (2*A8)/625 + (21*A9)/20000 - (191*A10)/5000 - (3*A11)/1250 + A12/25000 + 1840066435021196473/85899345920000

a8 =(163*A2)/5000 - (13*A1)/2000 + (131*A3)/20000 - A4/1000 + (83*A5)/10000 + (153*A6)/100000 + (67*A7)/10000 - (9*A8)/250 - (89*A9)/12500 - (9*A10)/2000 + (119*A11)/5000 + (133*A12)/25000 + 29492354401989141/8589934592000

a9 =(17*A1)/10000 + (189*A2)/5000 - (503*A3)/100000 + (99*A5)/10000 - A6/800 - (17*A7)/10000 - (201*A8)/5000 + (59*A9)/10000 + (11*A10)/10000 + (17*A11)/625 - (99*A12)/20000 - 21730715322231643/21474836480000

 a10 =(531*A1)/10000 + A2/1000 + A3/50000 - (481*A4)/10000 - A5/1250 - A6/12500 + (171*A7)/5000 + (3*A8)/5000 + (3*A9)/100000 - (37*A10)/2500 - (3*A11)/10000 + (21*A12)/100000 - 2030593692707169363/42949672960000

a11 =(9*A1)/5000 - (263*A2)/10000 - (409*A3)/50000 - (3*A4)/2000 + (237*A5)/10000 + (729*A6)/100000 + (3*A7)/5000 - (171*A8)/10000 - (503*A9)/100000 + A10/10000 + (9*A11)/1250 + (221*A12)/100000 - 44872478752500189/21474836480000

a12=A1/5000 - (237*A2)/5000 + (207*A3)/50000 - (3*A4)/10000 + (421*A5)/10000 - (73*A6)/20000 + A7/2500 - (141*A8)/5000 + (133*A9)/50000 - (3*A10)/10000 + (113*A11)/10000 - (129*A12)/100000 - 1115041531603137/4294967296000

[A1,A2,A3,A4,A5,A6,A7,A8,A9,A10,A11,A12]=solve(a1,a2,a3,a4,a5,a6,a7,a8,a9,a10,a11,a12);

[Reza]

Solve this recipe, I tried 5 Equation 5 unknown works but it gives the wrong answer