document.write( "Question 385957: I am trying to solve a system's problem.
\n" ); document.write( "Walt has three investments totaling $110,000. These investments earn interest at 8%, 10% and 12% respectively. Walt's total income from these investments is $11,600. The income from the 12% investment exceeds the total income from the other two investments by $400. Find how much Walt has invested at 8%. \r
\n" ); document.write( "\n" ); document.write( "Thanks so much for the help!! \r
\n" ); document.write( "\n" ); document.write( "Denise \n" ); document.write( "

Algebra.Com's Answer #272947 by stanbon(75887) $\"\"$ $\"About$

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Walt has three investments totaling $110,000. These investments earn interest at 8%, 10% and 12% respectively. Walt's total income from these investments is $11,600. The income from the 12% investment exceeds the total income from the other two investments by $400. Find how much Walt has invested at 8%.
\n" ); document.write( "---------------
\n" ); document.write( "Equations:
\n" ); document.write( "x + y + z = 110,000
\n" ); document.write( "8x+10y+12z= 1160000
\n" ); document.write( "z = (x+y)+400
\n" ); document.write( "---------------------------
\n" ); document.write( "Rearrange:
\n" ); document.write( "x + y + z = 110,000
\n" ); document.write( "8x+10y+12z= 1160000
\n" ); document.write( "x + y - z = -400
\n" ); document.write( "--------------------------
\n" ); document.write( "Use any method you know to get:
\n" ); document.write( "x = 25200
\n" ); document.write( "y = 29600
\n" ); document.write( "z = 55200
\n" ); document.write( "==============
\n" ); document.write( "Cheers,
\n" ); document.write( "Stan H. \n" ); document.write( "

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