<PRE><B>Question 1158915</B>
 Rosa invested some of her $15,000 in bonds that made a 6% profit and the rest in bonds that made a 10% profit.
 If the profit on the 10% bonds was $1,000 more than the profit on the 6% bonds, how much did Rosa invest in the 6% bonds?
:
Let a = amt invested at 6%
the total amt is 15000, therefore
(15000-a) = amt invested at 10%
:
return at 10% - return at 6% = 1000
.10(15000-a) - .06a = 1000
1500 - .10a - .06a = 1000
-10a - .06a = 1000 - 1500
-.16a = -500
a = -500/-.16
a = $3125 invested at 6%
:
:
Check: 15000 - 3125 = $11,875 invested at 10%
.10(11875) = 1187.50
.06(3125)  =  187.50
-------------------------subtraction
. .... . . . . . 1000
.
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