document.write( "Question 1106533: 5 years ago Sara's aunt was 4 times as old as Sara. If Sara's aunt is 42 years older than Sara, how old is Sara now? \n" ); document.write( "

Algebra.Com's Answer #721520 by ikleyn(52781) $\"\"$ $\"About$

You can put this solution on YOUR website!
.
\n" ); document.write( "

\r\n" );
document.write( "A -5 = 4*(S-5),    (1)    (\"5 years ago . . . \")\r\n" );
document.write( "A = S + 42.        (2)    (\"At present time . . . \")\r\n" );
document.write( "\r\n" );
document.write( "\r\n" );
document.write( "From (2), substitute the expression for A into (1). You will get\r\n" );
document.write( "\r\n" );
document.write( "(S + 42) - 5 = 4*(S-5),\r\n" );
document.write( "\r\n" );
document.write( "S + 37 = 4S - 20  ====>  37 + 20 = 4S - S  ====>  57 = 3S  ====>  S =  = 19.\r\n" );
document.write( "\r\n" );
document.write( "\r\n" );
document.write( "Answer.  Sara is 19 years old.\r\n" );
document.write( "

\r
\n" ); document.write( "\n" ); document.write( "----------------
\n" ); document.write( "There is a bunch of lessons on age word problems \r
\n" ); document.write( "\n" ); document.write( "    - Age problems and their solutions\r
\n" ); document.write( "\n" ); document.write( "    - A fresh formulation of a traditional age problem\r
\n" ); document.write( "\n" ); document.write( "    - Really intricate age word problem\r
\n" ); document.write( "\n" ); document.write( "    - Selected age word problems from the archive\r
\n" ); document.write( "\n" ); document.write( "    - Age problems for mental solution \r
\n" ); document.write( "\n" ); document.write( "in this site.\r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "Read them and become an expert in solving age problems.\r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "Also, you have this free of charge online textbook in ALGEBRA-I in this site\r
\n" ); document.write( "\n" ); document.write( "    - ALGEBRA-I - YOUR ONLINE TEXTBOOK.\r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "The referred lessons are the part of this online textbook under the topic \"Age word problems\".\r
\n" ); document.write( "
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "Save the link to this online textbook together with its description\r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "Free of charge online textbook in ALGEBRA-I
\n" ); document.write( "https://www.algebra.com/algebra/homework/quadratic/lessons/ALGEBRA-I-YOUR-ONLINE-TEXTBOOK.lesson\r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "to your archive and use it when it is needed.\r
\n" ); document.write( "
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( " \n" ); document.write( "

\n" );