求解如下方程组，MATLAB算不出来怎么办？

limopcb

( F: G  E) m, d% V& v# Q请教大神，
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求解如下方程组，九个方程九个未知数，MATLAB算不出来，很奇怪，按道理计算出来应该没问题的。感谢！
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clc;
: q: B$ b( Z& Cclear all;
close all;
$ T$ V" a5 C0 dsyms v1 v2 v4 P3ref
, G' R, `  T! u% R, _syms i12 i13 i14 i24 i34
. x4 T2 [* ~7 ?2 f9 e) a# k
r = 0.01;   
R12 = 75*r; R13 = 125*r; R14 = 200*r; R24 = 150*r; R34 = 175*r;

P1ref = 175e6; P2ref = 35e6; P4ref = 140e6; v3ref = 100e3;
v3 = v3ref;
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eq1 = P1ref/v1 - (i13 + i12 + i14);
eq2 = P2ref/v2 - (-i12 + i24);
8 i  ^9 R! Q' a( ceq3 = P3ref/v3 - (i13 - i34);
eq4 = P4ref/v4 - (i34 + i14 + i24);
eq5 = (v1 - v3)/R13 - i13;
# g: `, R  i: e! ~4 [eq6 = (v1 - v4)/R14 - i14;
0 b( C9 A, G, K0 U- L3 T3 Peq7 = (v1 - v2)/R12 - i12;
eq8 = (v2 - v4)/R24 - i24;
eq9 = (v3 - v4)/R34 - i34;

s = solve(eq1,eq2,eq3,eq4,eq5,eq6,eq7,eq8,eq9);

House

数值解试试：
; ~. l$ ]) v% ]) }, p, Y: Cv1: 101005.230297198
3 x- R) b+ ]& b$ `/ O2 P/ a- b5 Vi13: 804.184237758687
i12: 314.30767957579
$ b9 d+ l. ~5 f4 R; ~7 W  ?) V9 K& Ci14: 614.09162794411
v2: 100769.499537517
$ l5 L% S+ A" z( D, yi24: 661.634997470918
6 {( H, E0 j5 O9 A+ Bp3ref: 67678254.7078767
i34: 127.40169067992
9 n' W0 B0 i0 u2 U+ _3 yv4: 99777.0470413101

artic

syms v1 v2 v4 P3ref
syms i12 i13 i14 i24 i34

# J- T, g3 b# hr = 0.01;   
R12 = 75*r; R13 = 125*r; R14 = 200*r; R24 = 150*r; R34 = 175*r;

% t5 K% E6 q" l* s1 U! u" zP1ref = 175e6; P2ref = 35e6; P4ref = 140e6; v3ref = 100e3;
/ ^4 a9 n: N9 t8 gv3 = v3ref;
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eq1 = P1ref/v1 - (i13 + i12 + i14)==0;
" }  n: ]: z: \% [eq2 = P2ref/v2 - (-i12 + i24)==0;
/ K3 k9 `7 x# L; `* T' Meq3 = P3ref/v3 - (i13 - i34)==0;
eq4 = P4ref/v4 - (i34 + i14 + i24)==0;
eq5 = (v1 - v3)/R13 - i13==0;
eq6 = (v1 - v4)/R14 - i14==0;
1 B! @; _/ t2 H& meq7 = (v1 - v2)/R12 - i12==0;
eq8 = (v2 - v4)/R24 - i24==0;
7 y3 g% n- E" M- ieq9 = (v3 - v4)/R34 - i34==0;
eqns=[eq1,eq2,eq3,eq4,eq5,eq6,eq7,eq8,eq9]
/ x5 T3 U1 o3 a; a# Z7 pvars=[v1,v2,v4,P3ref,i12,i13,i14,i24,i34]
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s = vpasolve(eqns,vars)