document.write( "Question 435791: While assaulting a fortress, a marine fired 2000 rounds during two engagements . If he fired 800 rounds more in his first engagement that in his second, how many rounds did he fire his first engagement? \n" ); document.write( "
Algebra.Com's Answer #301605 by jorel1380(3719)\"\" \"About 
You can put this solution on YOUR website!
X+(X+800)=2000
\n" ); document.write( "2X=1200
\n" ); document.write( "X=600
\n" ); document.write( "X+800=1400
\n" ); document.write( "He fired 1400 rounds in his first engagement;600 in his second.
\n" ); document.write( "
\n" );