document.write( "Question 1017459: An executive invests $21,000, some at 8% and some at 6% annual interest. If he receives an annual return of $1,600 how much is invested at each rate \n" ); document.write( "
Algebra.Com's Answer #633756 by addingup(3677)\"\" \"About 
You can put this solution on YOUR website!
He invests 21000:
\n" ); document.write( "some at 8%. Let's call this x.
\n" ); document.write( "And the rest at 6%. The rest is 21000-x
\n" ); document.write( "The annual return is 1600
\n" ); document.write( "~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
\n" ); document.write( "0.08x+0.06(21000-x)= 1600
\n" ); document.write( "0.08x+1260-0.06x = 1600
\n" ); document.write( "0.02x = 240
\n" ); document.write( "x= 12,000 is invested at 8% and
\n" ); document.write( "21,000-12,000 = 9,000 is at 6%
\n" ); document.write( "J
\n" ); document.write( "
\n" );