document.write( "Question 552910: The sum of two numbers is 21 and their difference is 5. What are the number? \n" ); document.write( "
Algebra.Com's Answer #360579 by rajgahir(2)![]() ![]() ![]() You can put this solution on YOUR website! Let the no. be x and y. \n" ); document.write( " \n" ); document.write( "x + y = 21 ------eq(1) \n" ); document.write( "x - y = 5 ------eq(2) \n" ); document.write( " \n" ); document.write( "Add eq(1) and eq(2) \n" ); document.write( "now we will eliminate y 'cause +y -y =0 \n" ); document.write( " \n" ); document.write( "2x = 26 \n" ); document.write( " x = 26/2\r \n" ); document.write( "\n" ); document.write( " x = 13 now we have value of x , put the value of x in eq(2).\r \n" ); document.write( "\n" ); document.write( "13 - y = 5 \n" ); document.write( " -y = 5 -13 \n" ); document.write( " -y = -8 i;e y = 8\r \n" ); document.write( "\n" ); document.write( "So, the no.s are 13 and 8 \n" ); document.write( " |