document.write( "Question 1102116: twice the first number plus a second number is 42, and the first number minus the second number is -6. Find the number. \n" ); document.write( "

Algebra.Com's Answer #716746 by ikleyn(52788) $\"\"$ $\"About$

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document.write( "2x + y = 42,\r\n" );
document.write( " x - y = -6.\r\n" );
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document.write( "Add the two equations. You will get\r\n" );
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document.write( "3x = 42 - 6 = 36  ====>  x =  = 12.\r\n" );
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document.write( "Then from the second equation  y = x + 6 = 12 + 6 = 18.\r\n" );
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document.write( "Answer.  x= 12,  y= 18.\r\n" );
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