Question

繁星沒上……個申一定要上!!

求解謝謝，完全不懂😭🙏🏻

) 7. 已知A+2B=CK=10,B+C=D的Ke=6,則A+2D=3C的K為何?
(A)60 (B)16.7 (C)1.67 (D)0.28 (E)0.12.
10
Kc = f x = 0, +8
2