document.write( "Question 1088348: Shania is 4 times as old as Jenny. Jenny is 3 years older than Enrique. If their total age is 57, how old will Jenny be in four years ?\r
\n" ); document.write( "\n" ); document.write( "I tried the following:\r
\n" ); document.write( "\n" ); document.write( "S = 4x
\n" ); document.write( "J = x +3
\n" ); document.write( "E = x\r
\n" ); document.write( "\n" ); document.write( "4x+x+3+x=57\r
\n" ); document.write( "\n" ); document.write( "not sure how to continue from here...
\n" ); document.write( "thank you \n" ); document.write( "

Algebra.Com's Answer #702605 by josmiceli(19441) $\"\"$ $\"About$

You can put this solution on YOUR website!
(1) $\"+s+=+4j+\"$
\n" ); document.write( "(2) $\"+j+=+e+%2B+3+\"$
\n" ); document.write( "(3) $\"+s+%2B+j+%2B+e+=+57+\"$
\n" ); document.write( "------------------------
\n" ); document.write( "There are 3 unknowns and 3 equations,
\n" ); document.write( "so the problem is solvable
\n" ); document.write( "(2) $\"+e+=+j+-+3+\"$
\n" ); document.write( "Plug (1) and (2) into (3)
\n" ); document.write( "(3) $\"+4j+%2B+j+%2B+j+-+3+=+57+\"$
\n" ); document.write( "(3) $\"+6j+=+60+\"$
\n" ); document.write( "(3) $\"+j+=+10+\"$
\n" ); document.write( "and
\n" ); document.write( "(1) $\"+s+=+4j+\"$
\n" ); document.write( "(1) $\"+s+=+40+\"$
\n" ); document.write( "and
\n" ); document.write( "(2) $\"+e+=+j+-+3+\"$
\n" ); document.write( "(2) $\"+e+=+10+-+3+\"$
\n" ); document.write( "(2) $\"+e+=+7+\"$
\n" ); document.write( "Shania is 40
\n" ); document.write( "Jenny is 10
\n" ); document.write( "Enrique is 7
\n" ); document.write( "----------------
\n" ); document.write( "check:
\n" ); document.write( "(3) $\"+s+%2B+j+%2B+e+=+57+\"$
\n" ); document.write( "(3) $\"+40+%2B+10+%2B+7+=+57+\"$
\n" ); document.write( "(3) $\"+57+=+57+\"$
\n" ); document.write( "OK
\n" ); document.write( " \n" ); document.write( "

\n" );