document.write( "Question 1103886: Mary bought 3 hamburgers and 2 fries for $19. She then bought 5 hamburgers and 3 fries for $31. What is the price of each individually? \n" ); document.write( "

Algebra.Com's Answer #718579 by Fombitz(32388) $\"\"$ $\"About$

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$\"3H%2B2F=19\"$
\n" ); document.write( " $\"5H%2B3F=31\"$
\n" ); document.write( "Multiply eq. 1 by 3 and eq. 2 by 2 and subtract 1 from 2 to eliminate F.
\n" ); document.write( " $\"3%283H%2B2F%29-2%285H%2B3F%29=3%2819%29-2%2831%29\"$
\n" ); document.write( " $\"9H%2B6F-10H-6F=57-62\"$
\n" ); document.write( " $\"-H=-5\"$
\n" ); document.write( " $\"H=5\"$
\n" ); document.write( "Now use either equation to solve for F.
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