document.write( "Question 806781: Solve each system by addition, if possible\r
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document.write( "Having trouble understanding this.\r
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document.write( "x + y = 1
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document.write( "x - y = 7\r
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document.write( "Do I add it together like this:\r
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document.write( "x + y = 1
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document.write( "x - y = 7
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document.write( "2x = 8\r
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document.write( "Then, should I divide it like this:\r
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document.write( "8/2x = 4 \n" );
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Algebra.Com's Answer #486017 by ankor@dixie-net.com(22740)![]() ![]() You can put this solution on YOUR website! Solve each system by addition, if possible \n" ); document.write( "Having trouble understanding this. \n" ); document.write( "x + y = 1 \n" ); document.write( "x - y = 7 \n" ); document.write( "Do I add it together like this: \n" ); document.write( "x + y = 1 \n" ); document.write( "x - y = 7 \n" ); document.write( "-------------- \n" ); document.write( "2x = 8 \n" ); document.write( "Then, This \n" ); document.write( "x = 8/2 \n" ); document.write( "x = 4 \n" ); document.write( "Find y using the 1st equation \n" ); document.write( "4 + y = 1 \n" ); document.write( "y = 1 - 4 \n" ); document.write( "y = -3 \n" ); document.write( "Check the solutions in the 2nd equation \n" ); document.write( "4 - (-3) = \n" ); document.write( "Minus a minus is plus, therefore \n" ); document.write( "4 + 3 = 7 \n" ); document.write( " |