Question 187865
.09X+.06(2,400-X)=189
.09X+144-.06X=189
.03X=189-144
.03X=45
X=45/.03
X=$1,500 IS THE AMOUNT INVESTED @ 9%
2,400-1,500=$900 IS THE AMOUNT INVESTED @6%.
PROOF:
.09*1,500+.06*900=189
135+54=189
189=189