document.write( "Question 851773: A school copier can print 5 copies of a test per minute and 8 copies of a quiz per minute. If I make 167 copies in 25 minutes, how many of each did I copy?
\n" ); document.write( " \n" ); document.write( "

Algebra.Com's Answer #512988 by josmiceli(19441) $\"\"$ $\"About$

You can put this solution on YOUR website!
Let $\"+t+\"$ = the number of minutes that tests were copied
\n" ); document.write( "Let $\"+q+\"$ = the number of minutes that quizzes were copied
\n" ); document.write( "-------------------
\n" ); document.write( "(1) $\"+5t+%2B+8q+=+167+\"$
\n" ); document.write( "(2) $\"+t+%2B+q+=+25+\"$
\n" ); document.write( "---------------------
\n" ); document.write( "Multiply both sides of (2) by $\"+5+\"$
\n" ); document.write( "and subtract (2) from (1)
\n" ); document.write( "(1) $\"+5t+%2B+8q+=+167+\"$
\n" ); document.write( "(2) $\"+-5t+-+5q+=+-125+\"$
\n" ); document.write( " $\"+3q+=+42+\"$
\n" ); document.write( " $\"+q+=+14+\"$
\n" ); document.write( "and, since
\n" ); document.write( "(2) $\"+t+%2B+q+=+25+\"$
\n" ); document.write( "(2) $\"+t+%2B+14+=+25+\"$
\n" ); document.write( "(2) $\"+t+=+11+\"$
\n" ); document.write( "You copied 11 tests and 14 quizzes
\n" ); document.write( "check:
\n" ); document.write( "(1) $\"+5%2A11+%2B+8%2A14+=+167+\"$
\n" ); document.write( "(1) $\"+55+%2B+112+=+167+\"$
\n" ); document.write( "(1) $\"+167+=+167+\"$
\n" ); document.write( "OK\r
\n" ); document.write( "
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( " \n" ); document.write( "

\n" );