SOLUTION: Javier invests money in two simple interest accounts. He invests three times as much in an account paying 10 % as he does in an account paying 4 %. If he earns $102.00 in interest

Question 1122646: Javier invests money in two simple interest accounts. He invests three times as much in an account paying 10 % as he does in an account paying 4 %. If he earns $102.00 in interest in one year from both accounts combined, how much did he invest altogether?
Total Principal in Both Accounts = $
Answer by Boreal(15235) (Show Source): You can put this solution on YOUR website!
I=prt
x=principal in 4%
3x=principal in 10%; time=1
x*.04+3x(.1)=102
.34x=102
x=$300@4%=$12
3x=$900@10%=$90
He invested $1200.

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