document.write( "Question 13413: If I need to find the opposite of the expression 7x + 3x. \n" ); document.write( "
Algebra.Com's Answer #6780 by lainey(7)\"\" \"About 
You can put this solution on YOUR website!
You could just switch the 2 numbers around, 3x + 7x\r
\n" ); document.write( "\n" ); document.write( "or maybe it would be 7x - 3x, because subtraction is the opposite of addition\r
\n" ); document.write( "\n" ); document.write( "Some teachers teach it differently, I'm sorry that I am not that much of a help.
\n" ); document.write( "
\n" );