document.write( "Question 949213: Solve by addition \r
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document.write( "2x-3y=-2
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document.write( " 5x=2y-9\r
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document.write( "I did... 5x=2y-9 I triex to make the equation in Ax+By=c form. So I added 2y and I got 5x+2y=-9
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document.write( "And since 2x-3y=-2 was already in the ax+by=c form I did 5x+2y=-9(-2) and 2x-3y=-2 (5) and I got -10x-4y=18
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document.write( " 10x-15y=-10
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document.write( "The -10x and 10x cancel out so I added -4y and -15y and got -19y= 8 I then divided by -19y and got Y= 8/-19 \r
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document.write( "PLEASE HELP ME.. I AM STUCK AND PLEASE SHOW HOW TO CHECK MY ANSWERES.
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document.write( "Thank you \n" );
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Algebra.Com's Answer #579439 by Alan3354(69443)![]() ![]() You can put this solution on YOUR website! Solve by addition \n" ); document.write( " 2x-3y=-2 \n" ); document.write( " 5x=2y-9 \n" ); document.write( " I did... 5x=2y-9 I triex to make the equation in Ax+By=c form. So I added 2y and I got 5x+2y=-9 \n" ); document.write( " ****** You should have subtracted 2y --> 5x-2y = -9 ******** \n" ); document.write( " ===============================\r \n" ); document.write( " \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "2x -3y = -2 \n" ); document.write( "5x = 2y -9 --> 5x - 2y = -9 \n" ); document.write( "------------------- \n" ); document.write( "Multiply the 1st eqn by -2 and the 2nd by 3 \n" ); document.write( "-4x + 6y = 4 \n" ); document.write( "15x - 6y = -27 \n" ); document.write( "------------------ Add \n" ); document.write( "11x = -23 \n" ); document.write( "x = -23/11 \n" ); document.write( "----- \n" ); document.write( "Sub for x in any eqn to find y \n" ); document.write( "2x -3y = -2 \n" ); document.write( "-46/11 - 3y = -2 \n" ); document.write( "3y = -46/11 + 2 = -24/11 \n" ); document.write( "y = -8/11 \n" ); document.write( "============== \n" ); document.write( "2x -3y = -2 --> -46/11 + 24/11 = -22/11 = -2 Checks \n" ); document.write( "5x = 2y -9 --> -115/11 = -16/11 - 99/11 Checks \n" ); document.write( " |