document.write( "Question 141361This question is from textbook Prentice hall algebra 1
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document.write( ": How do I solve using a system of two equations in two variables?\r
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document.write( "The sum of the digits of a two-digit number is 9. The value of the number is 12 times the tens digit. Find the number.\r
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document.write( "I think the first equation is x+y=9 \n" );
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Algebra.Com's Answer #103012 by checkley77(12844)![]() ![]() ![]() You can put this solution on YOUR website! X+Y=9 \n" ); document.write( "X=9-Y \n" ); document.write( "10X+Y=12X \n" ); document.write( "10(9-Y)+Y=12(9-Y) \n" ); document.write( "90-10Y+Y=108-12Y \n" ); document.write( "-10Y+1Y+12Y=108-90 \n" ); document.write( "3Y=18 \n" ); document.write( "Y=18/3 \n" ); document.write( "Y=6 ANSWER FOR THE UNITS DIGIT. \n" ); document.write( "X=9-6 \n" ); document.write( "X=3 \n" ); document.write( "PROOF \n" ); document.write( "36=12*3 \n" ); document.write( "36=36 \n" ); document.write( " \n" ); document.write( " |