Question 120796
.11X+.09(6000-X)=624
.11X+540-.09X=624
.02X=624-540
.02X=84
X=84/.02
X=4200 AMOUNT INVESTED @ 11%.
6000-4200=1800 AMOUNT INVESTED @ 9%.
PROOF
.11*4200+.09*1800=624
462+162=624
624=624