document.write( "Question 190677: lisa and berverly had just $5 to spend for an after school snack. they could have bought 2 hamburgers and 1 carton of milk with no change back. or 1 hamburger and 2 cartons of milk with 40 cent change back. how much does a carton of milk cost \n" ); document.write( "

Algebra.Com's Answer #143159 by stanbon(75887) $\"\"$ $\"About$

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lisa and berverly had just $5 to spend for an after school snack. they could have bought 2 hamburgers and 1 carton of milk with no change back. or 1 hamburger and 2 cartons of milk with 40 cent change back. how much does a carton of milk cost
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\n" ); document.write( "Equations:
\n" ); document.write( "2h + m = 500 cents
\n" ); document.write( "h +2m = 460 cents
\n" ); document.write( "-----------------------
\n" ); document.write( "Multiply thru the 1st eq. to set it up for elimination:
\n" ); document.write( "4h + 2m = 1000
\n" ); document.write( "h + 2m = 460
\n" ); document.write( "----------------
\n" ); document.write( "Subtract 2nd from 1st to solve for \"h\":
\n" ); document.write( "3h = 540
\n" ); document.write( "h = 180 cents (cost of a hamburger)
\n" ); document.write( "------------
\n" ); document.write( "Substitute into h + 2m = 460 to solve for \"m\":
\n" ); document.write( "180 + 2m = 460
\n" ); document.write( "2m = 280
\n" ); document.write( "m = 140 cents (cost of a carton of mild)
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\n" ); document.write( "Cheers,
\n" ); document.write( "Stan H. \n" ); document.write( "

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