Question 208497
.07x+.05(1,600-x)=90
.07x+80-.05x=90
.02x=90-80
.02x=10
x=10/.02
x=500 amount invested @ 7%
1,600-500=1,100 amount invested @ 5%
Proof:
.07*500+.05*1,100=90
35+55=90
90=90