document.write( "Question 398852: One serving of Cornies breakfast cereal contains 2 grams of protein and 25 grams of carbohydrates. One serving of Oaties breaks cereal contains 4 grams of protein and 20 grams of carbohydrates. How many servings of each would provide exactly 24 grams of protein an d210 grams of carbohydrates? \n" ); document.write( "
Algebra.Com's Answer #282549 by josmiceli(19441)\"\" \"About 
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There are 2 grams of protein and 25 grams of carbohydrates in 1 serving of Cornies
\n" ); document.write( "There are 4 grams of protein and 20 grams of carbohydrates in 1 serving of Oaties.
\n" ); document.write( "Let \"a\" = number of servings of Cornies needed
\n" ); document.write( "Let \"b\" = number of servings of Oaties needed
\n" ); document.write( "----------------------------------------
\n" ); document.write( "given:
\n" ); document.write( "For protein:
\n" ); document.write( "(1) \"2a+%2B+4b+=+24\"
\n" ); document.write( "For carbs:
\n" ); document.write( "(2) \"25a+%2B+20b+=+210\"
\n" ); document.write( "Multiply both sides of (1) by \"5\"
\n" ); document.write( "and subtract (1) from (2)
\n" ); document.write( "(2) \"25a+%2B+20b+=+210\"
\n" ); document.write( "(1) \"-10a+-+20b+=+120\"
\n" ); document.write( "\"15a+=+90\"
\n" ); document.write( "\"a+=+6\"
\n" ); document.write( "And, from (1),
\n" ); document.write( "\"2%2A6+%2B+4b+=+24\"
\n" ); document.write( "\"4b+=+12\"
\n" ); document.write( "\"b+=+3\"
\n" ); document.write( "6 servings of Cornies and 3 servings of Oaties are needed
\n" ); document.write( "check answer:
\n" ); document.write( "For protein:
\n" ); document.write( "(1) \"2a+%2B+4b+=+24\"
\n" ); document.write( "(1) \"2%2A6+%2B+4%2A3+=+24\"
\n" ); document.write( "(1) \"12+%2B+12+=+24\"
\n" ); document.write( "OK
\n" ); document.write( "For carbs:
\n" ); document.write( "(2) \"25a+%2B+20b+=+210\"
\n" ); document.write( "(2) \"25%2A6+%2B+20%2A3+=+210\"
\n" ); document.write( "(2) \"150+%2B+60+=+210\"
\n" ); document.write( "(2) \"210+=+210\"
\n" ); document.write( "OK
\n" ); document.write( "
\n" );