SOLUTION: Larry Mitchell invested part of his $17,000 advance at 6% annual simple interest and the rest at 9% annual simple interest. If his total yearly interest from both accounts was $1,2

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Question 901176: Larry Mitchell invested part of his $17,000 advance at 6% annual simple interest and the rest at 9% annual simple interest. If his total yearly interest from both accounts was $1,230, find the amount invested at each rate.
Answer by richwmiller(17219) About Me  (Show Source):
You can put this solution on YOUR website!
x+y=17000,
0.06*x+0.09*y=1230
x=17000-y
0.06*(17000-y)+0.09*y=1230
1020-0.06y+0.09*y=1230
0.03*y=210
y=7000 at 9%
x=17000-y
x=10000 at 6%
check
0.06*10000+0.09*7000=1230
600+630=1230
1230=1230
ok