document.write( "Question 127163: I hope this is posted in the correct place. I need some help I do not understand how to do this. Thanks for any help you can give.
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document.write( "solve by elimination process and type an ordered pair.
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document.write( "4x - 9y = 14.5
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document.write( "7y - 2x = -8.5 \n" );
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Algebra.Com's Answer #93139 by solver91311(24713)![]() ![]() You can put this solution on YOUR website! Eq. 1: \n" ); document.write( "Eq. 2: \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "Start by putting the equations into standard form: \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "Eq. 1: \n" ); document.write( "Eq. 2: \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "Let's start by eliminating the y variable. We need a constant to multiply the first equation and another constant to multiply the second equation so that the coefficients on the y variables become additive inverses. 7 * -9 = -63 and 9 * 7 = 63. That should work.\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "Eq. 3: \n" ); document.write( "Eq. 4: \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "Now add the x terms together, the y terms together, and the constants together to create another equation that has a zero coefficient on y.\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "Eq. 5: \n" ); document.write( " \n" ); document.write( " \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "Go back to the original set of equations: \n" ); document.write( "Eq. 1: \n" ); document.write( "Eq. 2: \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "But this time, just multiply equation 2 by 2: \n" ); document.write( "Eq. 6: \n" ); document.write( "Eq. 7: \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "Add the equations to eliminate x \n" ); document.write( "Eq. 8: \n" ); document.write( " \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "Your solution set is (2.5,-.5) \n" ); document.write( " |