document.write( "Question 191891: 13+a=25+b\r
\n" ); document.write( "\n" ); document.write( "b-a= ?
\n" ); document.write( "

Algebra.Com's Answer #143978 by nerdybill(7384)\"\" \"About 
You can put this solution on YOUR website!
Isolate \"b-a\" to one side of the equation.
\n" ); document.write( ".
\n" ); document.write( "If you started with:
\n" ); document.write( "13+a=25+b
\n" ); document.write( "Subtract 'a' from both sides:
\n" ); document.write( "13 = 25+b-a
\n" ); document.write( "Now, subtract 25 from both sides:
\n" ); document.write( "13-25 = b-a
\n" ); document.write( "-12 = b-a (this is what they're looking for)
\n" ); document.write( "
\n" );