Question 149685
.09x+.08(9,000-x)=770
.o9x+720-.08x=770
.01x=770-720
.01x=50
x=50/.01
x=5,000 invested @ 9%
9,000-5,000=4,000 invested @ 8%
proof:
.09*5000+.08*4000=770
450+320=770
770=770