document.write( "Question 1071261: Write a proportion and solve. A 12 ounce serving of Mountain Dew contains 55mg of caffeine. How much is in an 18 ounce serving? \n" ); document.write( "
Algebra.Com's Answer #686215 by Boreal(15235)\"\" \"About 
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12 oz/55mg=18 oz/x mg
\n" ); document.write( "cross-multiply
\n" ); document.write( "12x=990
\n" ); document.write( "x=82.5 mg
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\n" ); document.write( "Recognize that 18 is half again 12
\n" ); document.write( "half again of 55 is 27.5, which added to 55=82.5
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