document.write( "Question 164278: referring to questions 163893,159668,159276.I understand grouping like expressions,such as a's go together b's go together c's go together and so on.But when I've tried to work problems I can't tell when I should add and when I should subtract.For example 3a-5-2b+3a+7b-2.My answer was 6a-2-9b.The correct answer was 6a+5b-7. \n" ); document.write( "
Algebra.Com's Answer #121039 by Fombitz(32388) You can put this solution on YOUR website! How's this... change all of the operations to addition. \n" ); document.write( "Negative numbers get parentheses around them. \n" ); document.write( "Then sort and combine. \n" ); document.write( "Maybe that'll work better. \n" ); document.write( " \n" ); document.write( " \n" ); document.write( " \n" ); document.write( " \n" ); document.write( " |