document.write( "Question 410902: I can't figure out this problem:\r
\n" ); document.write( "\n" ); document.write( "The sum of three sister's ages is 29. Jan is 3 years older than Cindy. Marsha is twice Jan's age. Find the girl's ages. \n" ); document.write( "

Algebra.Com's Answer #288865 by josmiceli(19441) $\"\"$ $\"About$

You can put this solution on YOUR website!
(1) $\"j+%2B+m+%2B+c+=+29\"$
\n" ); document.write( "(2) $\"j+=+c+%2B+3\"$
\n" ); document.write( "(3) $\"m+=+2j\"$
\n" ); document.write( "There are 3 equations and 3 unknowns,
\n" ); document.write( "so it's solvable
\n" ); document.write( "From (2),
\n" ); document.write( "(2) $\"c+=+j+-+3\"$
\n" ); document.write( "By substitution:
\n" ); document.write( "(1) $\"j+%2B+2j+%2B+j+-+3+=+29\"$
\n" ); document.write( "(1) $\"4j+=+32\"$
\n" ); document.write( "(1) $\"j+=+8\"$
\n" ); document.write( "and
\n" ); document.write( " $\"m+=+2%2A8\"$
\n" ); document.write( " $\"m+=+16\"$
\n" ); document.write( "and
\n" ); document.write( " $\"c+=+8+-+3\"$
\n" ); document.write( " $\"c+=+5\"$
\n" ); document.write( "Jan's age is 8
\n" ); document.write( "Cindy's age is 5
\n" ); document.write( "Marsha's age is 16 \n" ); document.write( "

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