document.write( "Question 845847: At McDonald's, four hamburgers and two orders of French fries cost $27.10. Three hamburgers and four orders of fries cost $25.20. If all hamburgers cost the same price and all orders of fries cost the same price, find the price of each. \r
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Algebra.Com's Answer #509585 by ankor@dixie-net.com(22740)\"\" \"About 
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At McDonald's, four hamburgers and two orders of French fries cost $27.10.
\n" ); document.write( " Three hamburgers and four orders of fries cost $25.20.
\n" ); document.write( " If all hamburgers cost the same price and all orders of fries cost the same price, find the price of each.
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\n" ); document.write( "let h = price of the hamburger
\n" ); document.write( "let f = price of the fries
\n" ); document.write( ":
\n" ); document.write( "Write two equations, one for each order
\n" ); document.write( "4h + 2f = 27.10
\n" ); document.write( "3h + 4f = 25.20
\n" ); document.write( ":
\n" ); document.write( "We will use elimination here; multiply the 1st equation by 2, subtract the 2nd equation
\n" ); document.write( "8h + 4f = 54.20
\n" ); document.write( "3h + 4f = 25.20
\n" ); document.write( "-------------------subtraction eliminates f, find h
\n" ); document.write( "5h = 29
\n" ); document.write( "h = 29/5
\n" ); document.write( "h = $5.80 for a hamburger
\n" ); document.write( ":
\n" ); document.write( "Find f using the 1st original equation, replace h with 5.80
\n" ); document.write( "4(5.8) + 2f = 27.10
\n" ); document.write( "23.20 + 2f = 27.10
\n" ); document.write( "2f = 27.10 - 23.20
\n" ); document.write( "2f = 3.90
\n" ); document.write( "f = 3.90/2
\n" ); document.write( "f = $1.95 for fries
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\n" ); document.write( "Check solutions in the 2nd equation, replace h and f
\n" ); document.write( "3(5.80) + 4(1.95) =
\n" ); document.write( "17.40 + 7.80 = 25.20, confirms our solutions \n" ); document.write( "
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