Question 129248
.055X+.04(12000-X)=532.5
.055X+480-.04X=532.5
.015X=532.5-480
.015X=52.5
X=52.5/.015
X=$3,500 AMOUNT INVESTED @ 5.5%
12,000-3,500=$8,500  INVESTED @ 4%
PROOF:
.055*3,500+.04*8,500=532.5
192.5+340=532.5
532.5=532.5