document.write( "Question 992040: How do you solve a 3x3 system of equations when the variables don't cancel out? For example, let's say your equations are 5x+7y=2 and 2x+9y=3. Can you multiply the first equation by 9 and the second equation by -7? \n" ); document.write( "
Algebra.Com's Answer #611734 by ikleyn(52780)![]() ![]() You can put this solution on YOUR website! . \n" ); document.write( " \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "If you want to exclude x, you may multiply the first equation by 2 (both sides) and the second equation by (-5) and then add them.\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "If you want to exclude y, you may multiply the first equation by 9 (both sides) and the second equation by (-7) and then add them.\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( " \n" ); document.write( " |