Bill invested $15,000 in three accounts. The savings account paid 1% interest, the Mutual fund paid 10% interest, and the CD paid 2% interest. In one year, Bill earned $210 in interest. If Bill put four times as much in savings as he put in the CD, how much money did Bill put into cds
If $x in the CD and $y in mutual funds, we have
x+y+4x = 15000
.02x + .10y + .01*4x = 210
Now just solve as usual.