假设:甲=X;乙=Y;
X+Y=500;
X=500-Y;
X*5%+Y*4%=23.5;
(500-Y)*5%+Y*4%=23.5;
25-0.05Y+0.04Y=23.5;
0.01Y=1.5;
Y=150;
X=500-150=350;
甲存:350元;乙存:150元;