设2000元的存款利率为x,1000元的存款利率为y,则x+y=3.24%2000x+1000y=54.9(1)式乘以1000,有1000x +1000y=32.4减去(2)式有,1000x=22.5所以x=2.25%所以y=3.24%-2.25%=0.99%2000元的存款利率为2.25%,1000元的存款利率为...你的减去（2）式错了，应是用2000x+1000y=54.9减去1000x+1000y=32.4.x才等于2.25％，不过还是谢谢你！~\(≧▽≦)/~~\(≧▽≦)/~~\(≧▽≦)/~~\(≧▽≦)/~~\(≧▽≦)/~~\(≧▽≦)/~~\(≧▽≦)/~~\(≧▽≦)/~~\(≧▽≦)/~~\(≧▽≦)/~~\(≧▽≦)/~~\(≧▽≦)/~O(∩_∩)O哈哈~O(∩_∩)O哈哈~O(∩_∩)O哈哈~O(∩_∩)O哈哈~O(∩_∩)O哈哈~o(≧v≦)o~~好棒o(≧v≦)o~~好棒o(≧v≦)o~~好棒o(≧v≦)o~~好棒