document.write( "Question 549351: Judy is three times her daughter's age. If the difference between their ages is 30, how old is the daughter? \n" ); document.write( "

Algebra.Com's Answer #357672 by vleith(2983) $\"\"$ $\"About$

You can put this solution on YOUR website!
Let D be the daughter's age
\n" ); document.write( " $\"Judy+=+3+%2A+D\"$
\n" ); document.write( " $\"Judy+-+D+=+30\"$
\n" ); document.write( " $\"3D+-+D+=+30\"$
\n" ); document.write( " $\"2D+=+30\"$
\n" ); document.write( " $\"D+=+15\"$
\n" ); document.write( "So Judy is a spry 45 and her daughter is 15 \n" ); document.write( "

\n" );