document.write( "Question 233013: can you help me with this word problem..??\r
\n" ); document.write( "\n" ); document.write( "Roast Beef has 25g or protein and 11g of calcium per serving. A serving of mashed potatoes has 2g of protein and 25g of calcium. How many servings of each are needed to supply exactly 29g of protein and 61g of calcium?\r
\n" ); document.write( "\n" ); document.write( "Thanks so much!
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Algebra.Com's Answer #172089 by ankor@dixie-net.com(22740)\"\" \"About 
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Roast Beef has 25g or protein and 11g of calcium per serving.
\n" ); document.write( " A serving of mashed potatoes has 2g of protein and 25g of calcium.
\n" ); document.write( " How many servings of each are needed to supply exactly 29g of protein and 61g of calcium?
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\n" ); document.write( "let b = servings of beef
\n" ); document.write( "let p = servings of potatoes
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\n" ); document.write( "Write two equations, one for protein and one for calcium
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\n" ); document.write( "Protein
\n" ); document.write( "25b + 2p = 29
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\n" ); document.write( "Calcium
\n" ); document.write( "11b + 25p = 61
\n" ); document.write( ":
\n" ); document.write( "Multiply the 1st equation by 25, multiply the 2nd by 2
\n" ); document.write( "625b + 50p = 725
\n" ); document.write( "22b + 50p = 122
\n" ); document.write( "-------------------subtraction eliminates p
\n" ); document.write( "603b = 603
\n" ); document.write( "b = 1 serving of beef
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\n" ); document.write( "Find p
\n" ); document.write( "25(1) + 2p = 29
\n" ); document.write( "2p = 29 - 25
\n" ); document.write( "2p = 4
\n" ); document.write( "p = 2 servings of potatoes
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\n" ); document.write( "check solution in the calcium equation
\n" ); document.write( "11(1) + 25(2) = 61
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