A + B + C + D + E + F = 107×6 = 642
(B + C + D + E)/4 + 25 = 107 即 B + C + D + E = 328
得
A + F = 642 - 328 = 314
A = 3F + 2
解得
A = 236
F = 78
A + B + C + D + E + F = 107×6 = 642
(B + C + D + E)/4 + 25 = 107 即 B + C + D + E = 328
得
A + F = 642 - 328 = 314
A = 3F + 2
解得
A = 236
F = 78