document.write( "Question 179098: Fill in the blank to make the folowing statement true\r \n" );
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document.write( "4x+9y=7 and 5x+8y=2 is called a __________________ of linear equations\r \n" );
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document.write( "a) composition \n" );
document.write( "b) solution \n" );
document.write( "c) association \n" );
document.write( "d) pair \n" );
document.write( "e) system \n" );
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