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)\"\" \"About 
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( "
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