document.write( "Question 20045: I am trying to help my 9th grader with algebra and I haven't a clue...She gets confused with the negative/positive part. When do you change or not: this is the problem: 3(5y+2)=4(3y+2)-1
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document.write( "PLEASE help. thanks dw \n" );
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Algebra.Com's Answer #9656 by elima(1433)![]() ![]() ![]() You can put this solution on YOUR website! 3(5y+2)=4(3y+2)-1 \n" ); document.write( "First distribute the 3 and the 4; \n" ); document.write( "15y+6=12y+8-1 \n" ); document.write( "15y+6=12y+7 \n" ); document.write( "Get the variable to one side; so you will subtract the 12y from both sides; \n" ); document.write( "15y+6-12y=12y+7-12y \n" ); document.write( "Now you have; \n" ); document.write( "3y+6=7, now move the 6 to the other side; \n" ); document.write( "3y+6-6=7-6 \n" ); document.write( "3y=1 \n" ); document.write( "Divide each side by 3; \n" ); document.write( " \n" ); document.write( "y= \n" ); document.write( "\n" ); document.write( "The rule for when to use negative or positive would; \n" ); document.write( "You do the OPPOSITE OPERATION! \n" ); document.write( "So if you have a problem such as; \n" ); document.write( "7x+3=-4 \n" ); document.write( "you will subtract 3 from both sides because it is being added. \n" ); document.write( "7x+3-3=-4-3 \n" ); document.write( "In the case of; \n" ); document.write( "3x-5=16 \n" ); document.write( "You would add 5 to both sides because it is being subtracted. \n" ); document.write( "3x-5+5=16+5 \n" ); document.write( "That is what I mean by the opposite operation. In the first case the operation was addition; the opposite would be subtraction, in the second case the operation was subtraction so the opposite would be addition! \n" ); document.write( "Hope you understand! \n" ); document.write( "If not let me know! \n" ); document.write( "=) \n" ); document.write( " \n" ); document.write( " |