Question 1074847
How much at 6%? Let's call the amount x
How much at 9%? Well, 10,000-x because x is at 6%
0.06x+0.09(10,000-x) = 684
0.06x+900-0.09x = 684
-0.03 = -216
Divide -216/-0.03 to get your answer, and remember -/-= +