document.write( "Question 1065445: In the following equation, why multiply by -2 to solve the system for the y-value here on the first equation?\r
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document.write( "X+2y=7
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document.write( "2x+2y=13 \n" );
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Algebra.Com's Answer #680603 by ikleyn(52778)![]() ![]() You can put this solution on YOUR website! . \n" ); document.write( "Multiply and then think.\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "This is the KEY: to think.\r \n" ); document.write( " \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "The KEY is to THINK.\r \n" ); document.write( " \n" ); document.write( " \n" ); document.write( "\n" ); document.write( " The KEY is to THINK.\r \n" ); document.write( " \n" ); document.write( " \n" ); document.write( "\n" ); document.write( " The KEY is to THINK.\r \n" ); document.write( " \n" ); document.write( " \n" ); document.write( "\n" ); document.write( " \n" ); document.write( " |