Question 911734
I just did one that is almost identical.
http://www.algebra.com/algebra/homework/word/finance/Money_Word_Problems.faq.question.911728.html

z+x+y=1650
.11*550+0.06*x+0.012*y=.09*1650
60.50+0.06*x+0.012*y=148.50
1650-550=1100
148.50-60.50=88
Now we have two equations in two unknowns
x+y=1100
0.06*x+0.012*y=88