document.write( "Question 900027: Belinda had &20,000 to invest. She invested part of it at 10% and the remainder at 12%. If her income from the two investments was $2160, then how much did she invest at each rate? \n" ); document.write( "
Algebra.Com's Answer #545751 by richwmiller(17219)![]() ![]() You can put this solution on YOUR website! x+y=20000, \n" ); document.write( "0.1*x+0.12*y=2160 \n" ); document.write( "x=20000-y \n" ); document.write( "0.1*(20000-y)+0.12*y=2160 \n" ); document.write( "2000-0.1y+0.12*y=2160 \n" ); document.write( "0.02*y=160 \n" ); document.write( "y= 8000 \n" ); document.write( "x=20000-y \n" ); document.write( "x=12000 \n" ); document.write( "check \n" ); document.write( "0.1*12000+0.12*8000=2160 \n" ); document.write( "1200+960=2160 \n" ); document.write( "2160=2160 \n" ); document.write( "ok \n" ); document.write( " \n" ); document.write( " |