用戶【C.f. Lin】點評問題和點評內容

【評論主題】

【評論內容】稅前均衡條件:Pd = Ps, 160 - 6q = 61 + 3q, q = 11, P = 94, 稅後均衡條件:Pd - Ps = t, 160 - 6q - 61 - 3q = 27, q = 8, Pd = 160 - 6*8 = 112, 前轉 = 112 - 94 = 18,選 C