document.write( "Question 323430: Mrs Stuart invested part of $4200 at 7% and the rest at 7.5%. If her total annual income from these investments was $306, how much did she invest at each rate? \n" ); document.write( "
Algebra.Com's Answer #231485 by checkley77(12844)![]() ![]() ![]() You can put this solution on YOUR website! .075X+.07(4,200-X)=306 \n" ); document.write( ".075X+294-.07X=306 \n" ); document.write( ".005X=306-294 \n" ); document.write( ".005X=12 \n" ); document.write( "X=12/.005 \n" ); document.write( "X=2,400 AMOUNT INVESTED @ 7.5%. \n" ); document.write( "4,200-2,400=1,800 AMOUNT INVESTED @ 7%. \n" ); document.write( "PROOF: \n" ); document.write( ".075*2,400+.07*1,800=306 \n" ); document.write( "180+126=306 \n" ); document.write( "306=306 \n" ); document.write( " |