document.write( "Question 246893: 3x + 4y = 5
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document.write( "2x + 3y = 4 \r
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document.write( "Solve this problem using elimination.
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document.write( "I wasn't sure how to do it, because you can't elimate any one of those numbers. \n" );
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Algebra.Com's Answer #180207 by dabanfield(803)![]() ![]() ![]() You can put this solution on YOUR website! 3x + 4y = 5 \n" ); document.write( "2x + 3y = 4 \n" ); document.write( "Solve this problem using elimination.\r \n" ); document.write( "\n" ); document.write( "If we multiply both sides of the first equation by 2 and both sides of the second equation by 3 we have:\r \n" ); document.write( "\n" ); document.write( "6x + 8y = 10 \n" ); document.write( "6x + 9y = 12\r \n" ); document.write( "\n" ); document.write( "We did this so we would have the same coefficient on x (that is 6). So now we can subtract the second equation from the first eliminating x:\r \n" ); document.write( "\n" ); document.write( "(6-6)x +(8-9)y = 10-12 \n" ); document.write( "(0)x + (-1)y = -2 \n" ); document.write( "-y = -2 \n" ); document.write( "y = 2\r \n" ); document.write( "\n" ); document.write( "Now substitute y=2 in either of the original equations and solve for x.\r \n" ); document.write( "\n" ); document.write( " \n" ); document.write( " |