mi na 1SI 2 9. 1. kırtasiye 1 kalem= 18 TL 1 defter= 15 TL 3-b+3.15 = 3(18+ 15) A) 27 2. kirtasiye 1 kalem= 12 TL 1 defter= 30 TL 3-12+3-30 = 3(a+ 12) Yukarıda verilen iki farklı kırtasiyenin fiyat listesinde bazı sayılar verilmemiştir. Buna göre a +b kaçtır? B) 42 C) 45 D) 48
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