document.write( "Question 886323: A group of students bought 10 barbecues and 12 soft drinks at a cost of Php 320 . Another group of students bought 6 barbecues and 4 soft drinks at a cost of a Php 160. What is the cost of a single barbecue? a single soft drink? \n" ); document.write( "

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A group of students bought 10 barbecues and 12 soft drinks at a cost of Php 320 . Another group of students bought 6 barbecues and 4 soft drinks at a cost of a Php 160. What is the cost of a single barbecue? a single soft drink?
\n" ); document.write( "--------
\n" ); document.write( "Value equations:
\n" ); document.write( "10b + 12d = 320
\n" ); document.write( "6b + 4d = 160
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\n" ); document.write( "Modify for elimination::
\n" ); document.write( "10b + 12d = 320
\n" ); document.write( "18b + 12d = 480
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\n" ); document.write( "Subtract and solve for \"b\"::
\n" ); document.write( "8b = 160
\n" ); document.write( "b = 20 (cost of a barbeque)
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\n" ); document.write( "Cheers,
\n" ); document.write( "Stan H.
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\n" ); document.write( "Solve for \"d\":
\n" ); document.write( "6b + 4d = 160
\n" ); document.write( "120 + 4d = 160
\n" ); document.write( "4d - 40
\n" ); document.write( "d = 10 (cost of a soft drink) \n" ); document.write( "

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