document.write( "Question 327807: Kathy and Juanita had a light afternoon snack. Kathy enjoyed 3 chips and 2 pretzels, for a total of 77 calories. Juanita enjoyed 2 chips and 15 pretzels, for a total of 195 calories. How many calories are each pretzel? \n" ); document.write( "
Algebra.Com's Answer #234784 by ankor@dixie-net.com(22740)\"\" \"About 
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Kathy and Juanita had a light afternoon snack.
\n" ); document.write( " Kathy enjoyed 3 chips and 2 pretzels, for a total of 77 calories.
\n" ); document.write( " Juanita enjoyed 2 chips and 15 pretzels, for a total of 195 calories.
\n" ); document.write( "How many calories are each pretzel?
\n" ); document.write( ":
\n" ); document.write( "let c = no. of calories in a chip
\n" ); document.write( "let p = no. of calories in a pretzel
\n" ); document.write( ":
\n" ); document.write( "Write an equation for each girl
\n" ); document.write( ":
\n" ); document.write( "3c + 2p = 77
\n" ); document.write( "2c + 15p = 195
\n" ); document.write( ":
\n" ); document.write( "Multiply the 1st equation by 7.5, subtract the 2nd equation
\n" ); document.write( "22.5c + 15p = 577.5
\n" ); document.write( "2c + 15p = 195
\n" ); document.write( "------------------subtraction eliminate p, find c
\n" ); document.write( "20.5c = 382.5
\n" ); document.write( "c = \"382.5%2F20.5\"
\n" ); document.write( "c = 18.7 calories
\n" ); document.write( ":
\n" ); document.write( "Find p
\n" ); document.write( "3(18.7) + 2p = 77
\n" ); document.write( "56 + 2p = 77
\n" ); document.write( "2p = 77-56
\n" ); document.write( "2p = 21
\n" ); document.write( "p = \"21%2F2\"
\n" ); document.write( "p = 10.5 calories
\n" ); document.write( ":
\n" ); document.write( ":
\n" ); document.write( "Check solution in 2nd original equation, 2c + 15p = 195:
\n" ); document.write( "2(18.7) + 15(10.5) =
\n" ); document.write( "37.4 + 157.5 = 194.9 ~ 195 \n" ); document.write( "
\n" );