document.write( "Question 1020152: Write a pair of equivalent equations which can be solved by adding or subtracting \r
\n" ); document.write( "\n" ); document.write( " 1) 2x+3y=10
\n" ); document.write( " 3x+4y=-2 \r
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\n" ); document.write( "\n" ); document.write( "2) 7x-6=10
\n" ); document.write( " 2x+5y=23 \n" ); document.write( "

Algebra.Com's Answer #636114 by ikleyn(52847) $\"\"$ $\"About$

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\n" ); document.write( "Write a pair of equivalent equations which can be solved by adding or subtracting
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document.write( "1)        \r\n" );
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document.write( "2x + 3y = 10,   (1)\r\n" );
document.write( "3x + 4y = -2.   (2) \r\n" );
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document.write( "Multiply the equation (1) by 3 (both sides) and the equation (2) by 2. You will get an equivalent system\r\n" );
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document.write( "6x + 9y = 30,   (1')\r\n" );
document.write( "6x + 8y = -4    (2')\r\n" );
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document.write( "The last system can be solved by distraction.\r\n" );
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document.write( "2)        \r\n" );
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document.write( "7x - 6  = 10,\r\n" );
document.write( "2x + 5y = 23.\r\n" );
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Are you sure you correctly wrote this system?\r
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