two mixtured solutions, A pond contains 3/4 peanut, rest is cashew. The weight of cashew in B is the same as in A, but peanut is 8 ponds less than A. A pond contains 7/10 peanuts in B. Question, how many ponds is A?
答案48
I don't what this means-- "A pond contains 7/10 peanuts in B."
Can any body teach me how to solve this problem? Thanks.