Math
posted by Lily on .
Q:Mr.Camacho invested twice as much in a savings account at 6.5% as he invested in a U.S. Treasure Note at 7%. If his yearly income from both investments is $800.00, how much has he invested at 6.5% and how much at 7%?
A: Equation: ____
6.5%: ______
7%:________

Let's say he invested X at 7% and 2X at 6.5%.
0.07X + (0.065)(2X) = 800
0.2 X = 800
X = 4000 dollars
2X = 8000 dollars