document.write( "Question 386368: Please help me solve this word problem of two linear equations in two unknowns....word problem:\r
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document.write( "The sum of 2 numbers is 87. If twice the smaller number is subtracted from the larger number, the result is 12. Find the two numbers.\r
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document.write( "I tried:\r
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document.write( "x+y=87
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document.write( "2x-y=12......this equation doesnt work for the answers....What am I doing wrong?\r
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document.write( "the answer is .....62 for the larger...25 for the smaller \n" );
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Algebra.Com's Answer #273131 by mananth(16946) You can put this solution on YOUR website! The sum of 2 numbers is 87. If twice the smaller number is subtracted from the larger number, the result is 12. Find the two numbers.\r \n" ); document.write( "\n" ); document.write( "I tried:\r \n" ); document.write( "\n" ); document.write( "x+y=87 \n" ); document.write( "2x-y=12......this equation doesnt work for the answers....What am I doing wrong?\r \n" ); document.write( "\n" ); document.write( "the answer is .....62 for the larger...25 for the smaller \n" ); document.write( "... \n" ); document.write( "x+y =87 \n" ); document.write( "x-2y =12 ( this is the most common mistake of students)(2y is subtracted from x) \n" ); document.write( "... \n" ); document.write( "multiply first equation by -1 \n" ); document.write( "-x-y=-87 \n" ); document.write( "add it to second \n" ); document.write( "-y-2y=-87+12 \n" ); document.write( "-3y=-75 \n" ); document.write( "/-3y \n" ); document.write( " \n" ); document.write( "87-25=62 \n" ); document.write( " \n" ); document.write( "... \n" ); document.write( "m.ananth@hotmail.ca \n" ); document.write( " |