document.write( "Question 418511: 180 TICKETS SOLD = $1620 HOW MANY $10 tickets and $7.50 tickets \n" ); document.write( "
Algebra.Com's Answer #292845 by mananth(16949)\"\" \"About 
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$ 10 tickets x
\n" ); document.write( "$ 7.50 tickets = y\r
\n" ); document.write( "\n" ); document.write( "Total ticket = 180
\n" ); document.write( "value = 1620\r
\n" ); document.write( "\n" ); document.write( "x+y=180 .............1
\n" ); document.write( "10x+7.5 y=1620 .............2
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\n" ); document.write( "multiply (1)by -7.5
\n" ); document.write( "Multiply (2) by 1
\n" ); document.write( "-7.5x-7.5y=-1350
\n" ); document.write( "10x+7.5y=1620
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\n" ); document.write( "Add the two equations
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\n" ); document.write( "2.5x=270
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\n" ); document.write( "/2.5
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\n" ); document.write( "x=108
\n" ); document.write( "
\n" ); document.write( "plug value of x in (1)
\n" ); document.write( "
\n" ); document.write( "1x+y=180
\n" ); document.write( "108+y=180
\n" ); document.write( "y=180-108
\n" ); document.write( "y=72
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