There are thirty-three benches (板凳) of two kinds. One has three legs and the other has four. There are one hundred legs in all (总共). How many benches are there with three legs and how many with four？-长理培训找题

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There are thirty-three benches (板凳) of two kinds. One has three legs and the other has four. There are one hundred legs in all (总共). How many benches are there with three legs and how many with four？

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