document.write( "Question 137655: Solve by the elimination method.\r
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document.write( "9x-9y=36\r
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document.write( "7y-3x= -14
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document.write( "What is the solution of the system?
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document.write( "Can someone explain this to me? I do not understand this at all...not of it. \n" );
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Algebra.Com's Answer #100681 by scott8148(6628)![]() ![]() You can put this solution on YOUR website! in order to ELIMINATE one of the variables, you need to get the absolute value of the coefficients to match \n" ); document.write( "__ then you can either add or subtract the equations and the variable will be cancelled (eliminated)\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "multiplying the second equation by 3 __ 21y-9x=-42 \n" ); document.write( "__ adding to first equation __ 9x-9y+21y-9x=36-42 __ 12y=-6 __ y=-1/2\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "substituting __ 7(-1/2)-3x=-14 __ -3x=-21/2 __ x=7/2 \n" ); document.write( " |