Question 181040
.07x+.09(12,000-x)=970
.07x+1080-.09x=970
-.02x=970-1080
-.02x=110
x=-110/-.02
x=5,500 amount invested @ 7%
12,000-5,500=6,500 amount invested @ 9%
Proof:
.07*5,500+.09*6,500=970
385+586=970
970=970