document.write( "Question 1099090: Jack is 2 times as old as Lacy. 7 years from now the sum of their ages will be
\n" ); document.write( "59.How old are they now? \n" ); document.write( "

Algebra.Com's Answer #713477 by josmiceli(19441) $\"\"$ $\"About$

You can put this solution on YOUR website!
Let $\"+a+\"$ = Jack's age now
\n" ); document.write( "Let $\"+b+\"$ = Lacy's age now
\n" ); document.write( "----------------------------
\n" ); document.write( "(1) $\"+a+=+2b+\"$
\n" ); document.write( "(2) $\"+%28+a%2B7+%29+%2B%28+b%2B7+%29+=+59+\"$
\n" ); document.write( "-----------------------------
\n" ); document.write( "Plug (1) into (2)
\n" ); document.write( "(2) $\"+%28+2b+%2B+7+%29+%2B+%28+b+%2B+7+%29+=+59+\"$
\n" ); document.write( "(2) $\"+3b+%2B+14+=+59+\"$
\n" ); document.write( "(2) $\"+3b+=+45+\"$
\n" ); document.write( "(2) $\"+b+=+15+\"$
\n" ); document.write( "and
\n" ); document.write( "(1) $\"+a+=+2%2A15+\"$
\n" ); document.write( "(1) $\"+a+=+30+\"$
\n" ); document.write( "-------------------
\n" ); document.write( "Jack is 30 and
\n" ); document.write( "Lacy is 15
\n" ); document.write( "-------------------
\n" ); document.write( "check:
\n" ); document.write( " $\"+%28+a+%2B+7+%29+%2B+%28+b+%2B+7+%29+=+59+\"$
\n" ); document.write( " $\"+%28+30+%2B+7+%29+%2B+%28+15+%2B+7+%29+=+59+\"$
\n" ); document.write( " $\"+37+%2B+22+=+59+\"$
\n" ); document.write( " $\"+59+=+59+\"$
\n" ); document.write( "OK \n" ); document.write( "

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