document.write( "Question 378654: Roger bought five bags of pretzels and three calculators for $31. Stephen bought twenty bags of pretzels and a calculator for $47. Emily bought two bags of pretzels and five calculators. How much did she pay? \n" ); document.write( "
Algebra.Com's Answer #268931 by mananth(16946)\"\" \"About 
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Roger bought five bags of pretzels and three calculators for $31. Stephen bought twenty bags of pretzels and a calculator for $47. Emily bought two bags of pretzels and five calculators. How much did she pay?
\n" ); document.write( "...
\n" ); document.write( "let pretzels cost $x each
\n" ); document.write( "calculators cost $y each
\n" ); document.write( "..
\n" ); document.write( "ROGER
\n" ); document.write( "5x+3y=31............................1
\n" ); document.write( "...
\n" ); document.write( "Stephen
\n" ); document.write( "20x+y=47............................2
\n" ); document.write( "multiply (10 by -4
\n" ); document.write( "-20x-12y=-124
\n" ); document.write( "add it to(2)
\n" ); document.write( "20x-20x+y-12y=-124+47
\n" ); document.write( "-11y=-77
\n" ); document.write( "/-11
\n" ); document.write( "-11y/-11= -77/-11
\n" ); document.write( "y=$ 7 cost of calculator
\n" ); document.write( "...
\n" ); document.write( "Plug the value of y in (2)
\n" ); document.write( "20x+y =47
\n" ); document.write( "20x+7=47
\n" ); document.write( "-7
\n" ); document.write( "20x+7-7=47-7
\n" ); document.write( "20x=40
\n" ); document.write( "/20
\n" ); document.write( "20x/20=40/20
\n" ); document.write( "x= $ 2 the price of pretzels
\n" ); document.write( "...
\n" ); document.write( "Plug value of x&y to find how much emily paid
\n" ); document.write( "m.ananth@hotmail.ca
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