✨ 最佳解答 ✨
如圖
a + d + f + 4 = 27
=> a + d + f = 23 ...(1)
b + d + e + 4 = 23
=> b + d + e = 19 ...(2)
c + e + f + 4 = 22
=> c + e + f = 18 ...(3)
a + b + c + d + e + f = 50 - 4 = 46 ...(4)
(1)+(2)+(3):a + b + c + 2(d + e + f) = 60 ...(5)
(5)-(4):d + e + f = 60 - 46 = 14 ...(6)
(4)-(6):a + b + c = 46 - 14 = 32 #
謝謝你!好清楚~