Question 732272
.11X+.085(9000-X)=840
.11X+765-.085X=840
.11X-.085X=840-765
.025X=75
X=75/.025
X=$3,000 INVESTED @ 11%
9,000-3,000=$6,000 INVESTED @ 8,5%
PROOF:
.11*3,000+.085*6,000=840
330+510=840
840=840