document.write( "Question 147355: Hi, I dont know what Im doing wrong I need help please. Here is the question: One year ago you invested $4300 into three accounts that earn 3.25%, 4%, and 5.75% annual interest. The interest you earned after one year is $193. You remembered you invested three times as much in the 4% account than you did the 3.25% account. How much did you invest in each type of account? This is what i have so far, I dont think its right.
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document.write( "x + y + Z = 4300
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document.write( "325x + 400Y + 575z = 19300
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document.write( "Y=3x
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document.write( "x + (3x) + Z = 4300
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document.write( "4x + z = 4300
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document.write( "325x + 400 (3x) + z =19300
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document.write( "1525x +575z = 19300\r
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document.write( "(-575) 4x + z = 4300 (-575)
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document.write( "-2300x - 575z =-2472500
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document.write( "1525x + 575z = 19300
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document.write( "-775x = -2453200
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document.write( "x=3165.4 then when I do 3 times x to get y it doesnt fit with the total of 4300. I dont know please help me thank you.
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document.write( "
Algebra.Com's Answer #107731 by checkley77(12844)![]() ![]() ![]() You can put this solution on YOUR website! x+y+z=4300 (multiply by -.0575 & subtract. You neglected to change the % to decimals.) \n" ); document.write( ".0325x+.04y+.0575z=193 \n" ); document.write( "-.0575x-.0575y-.0575z=-247.25 \n" ); document.write( "-------------------------------- \n" ); document.write( "-.0255x-.0175y=-54.25 \n" ); document.write( "y=3x \n" ); document.write( "-.0255x-.0175*3x=-54.25 \n" ); document.write( "-.0255x-.0525x=-54.25 \n" ); document.write( "-.078x=-54.75 \n" ); document.write( "x=-54.25/-.078 \n" ); document.write( "x=695.52 amount invested @ 3.25% \n" ); document.write( "3*695.52=2,086.54 amount invested @ 4% \n" ); document.write( "695.52+2,086.54+y=4,300 \n" ); document.write( "y=4,300-695.52-2,086.54 \n" ); document.write( "y=1,517.94 amount invested @ 5.75% \n" ); document.write( "proof: \n" ); document.write( ".0325*695.52+.04*2,086.54+.0575*1,517.94=193 \n" ); document.write( "22.60+83.46+87.28=193 \n" ); document.write( "193~193 \n" ); document.write( " \n" ); document.write( " |