document.write( "Question 271023: Please help me solve this question:\r
\n" ); document.write( "\n" ); document.write( "The sum of Al's age and his older brother's age is 29. The difference between their ages is 5 years. How old is Al?\r
\n" ); document.write( "\n" ); document.write( "I came up with:\r
\n" ); document.write( "\n" ); document.write( "B+A=29
\n" ); document.write( "B-A=5
\n" ); document.write( "A=?\r
\n" ); document.write( "\n" ); document.write( "But then, I don't know how to write the equation.
\n" ); document.write( "Thanks
\n" ); document.write( "

Algebra.Com's Answer #198418 by drk(1908)\"\" \"About 
You can put this solution on YOUR website!
we start with these equations
\n" ); document.write( "(1) \"B%2BA=29\"
\n" ); document.write( "(2) \"B-A=5\"
\n" ); document.write( "step 1 - add down to get
\n" ); document.write( "(3) \"2B+=+34\"
\n" ); document.write( "step 2 - divide to get
\n" ); document.write( "(4) \"b+%2B+17\"
\n" ); document.write( "step 3 - by substitution,
\n" ); document.write( "\"A+=+12\"
\n" ); document.write( "
\n" );