document.write( "Question 264258: A man purchased a number of books at $7.00 and twice as many books at $12.50 each. The total cost came to $768. If x is the number of $7.00 books purchases, write down an equation and solve it to find the number of books purchased.(round your answer to the nearest book)\r
\n" );
document.write( "\n" );
document.write( "I am getting confused by the missing total amount of books. It is supposedly 3x to get the thirds, but there I can't get the answer. \n" );
document.write( "
Algebra.Com's Answer #194590 by checkley77(12844) ![]() You can put this solution on YOUR website! 7x+12.50*2x=768 \n" ); document.write( "7x+25x=768 \n" ); document.write( "32x=768 \n" ); document.write( "x=768/32 \n" ); document.write( "x=24 $7 books were purchased. \n" ); document.write( "2*24=48 $12.50 books were purchased. \n" ); document.write( "Proof: \n" ); document.write( "7*24+48*12.50=768 \n" ); document.write( "168+600=768 \n" ); document.write( "768=768 \n" ); document.write( " |