document.write( "Question 1155563: Mary is 16 years older than David, David is 13 years younger than Charlie. If the sum of their ages is 62, how old is Mary? \n" ); document.write( "

Algebra.Com's Answer #778151 by greenestamps(13200) $\"\"$ $\"About$

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\n" ); document.write( "The given information compares Mary's and Charlie's ages to David's age. So use David's age as the variable:

\n" ); document.write( "x = David's age
\n" ); document.write( "x+16 = Mary's age (she is 16 years older than David)
\n" ); document.write( "x+13 = Charlie's age (David is 13 years younger than Charlie, so Charlie is 13 years older than David)

\n" ); document.write( "The sum of their ages is 62:

\n" ); document.write( " $\"%28x%29%2B%28x%2B16%29%2B%28x%2B13%29+=+62\"$

\n" ); document.write( "Solve using basic algebra.

\n" ); document.write( "Then remember the question asks for Mary's age, which is x+16 -- not just x.

\n" ); document.write( " \n" ); document.write( "

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