document.write( "Question 712481: A student bought three textbooks for his physics,chemistry and mathematics courses. The hemistry text cost $8 more that the mathematics text. The physics text cost twice as much as the chemistery text. If the total bill was $156, what was the price of each book? \n" ); document.write( "
Algebra.Com's Answer #437987 by richwmiller(17219)![]() ![]() You can put this solution on YOUR website! three unknowns need three equations \n" ); document.write( "c=m+8 \n" ); document.write( "m=c-8 \n" ); document.write( "p=2c \n" ); document.write( "p+c+m=156 \n" ); document.write( "2c+c+c-8=156 \n" ); document.write( "4c-8=156\r \n" ); document.write( "\n" ); document.write( "4c=164 \n" ); document.write( "c=41 \n" ); document.write( "p=82 \n" ); document.write( "m=33 \n" ); document.write( "check \n" ); document.write( "41+82+33=156 \n" ); document.write( "156=156 \n" ); document.write( "ok\r \n" ); document.write( "\n" ); document.write( " \n" ); document.write( " |