桌子28张,椅子19把。,e+E.d:m7E(Z9N
还需要多少把椅子才能全部配成套?,e+E.d:m7E(Z9N
算式:提示5S;H.T,W0h;L4E(d/l5a;y7_-J,e+E.d:m7E(Z9N
答;还需要5_'N+L/q/r1Q6u,q5X'd8A7u4Z)U把椅子才能全部配成套。,e+E.d:m7E(Z9N