总袋数
= 35 ÷ [11/(12+11) - (1 - 1/5)× 12/(12+11)]
= 35÷ 7/(23*5)
= 575 袋
面粉 = 575 ×11/(11+12) = 275 袋
大米 = 575 - 275 或 = 575 ×12/(11+12) = 300 袋
如需方程解法请追问
总袋数
= 35 ÷ [11/(12+11) - (1 - 1/5)× 12/(12+11)]
= 35÷ 7/(23*5)
= 575 袋
面粉 = 575 ×11/(11+12) = 275 袋
大米 = 575 - 275 或 = 575 ×12/(11+12) = 300 袋
如需方程解法请追问