Question 127046
.10x+.01(31,000-x)=1390
.10x+310-.01x=1390
.09x=1390-310
.09x=1080
x=1080/.09
x=12,000 answer for the amount invested @ 10%.
31,000-12,000=19,000 amount invested @ 1%.
PROOF:
.10*12000+.01*19000=1390
1200+190=1390
1390=1390