document.write( "Question 102311: The sum of two numbers is 36. The difference between the larger number and 8 equals the total of 4 and 3 times the smaller number. Find the 2 numbers \n" ); document.write( "
Algebra.Com's Answer #74367 by doukungfoo(195)![]() ![]() You can put this solution on YOUR website! Lets call the larger number x \n" ); document.write( "and the smaller number y \n" ); document.write( "So first we are told that: \n" ); document.write( "The sum of two numbers is 36 \n" ); document.write( "using our variables write an equation to support this statement. \n" ); document.write( "x + y = 36 \n" ); document.write( "Ok next we are told that: \n" ); document.write( "The difference between the larger number and 8 equals the total of 4 and 3 times the smaller number. \n" ); document.write( "write an equation to support this statement \n" ); document.write( "x - 8 = 4 + 3y \n" ); document.write( "simplify \n" ); document.write( "x - 3y = 12 \n" ); document.write( "ok now we have a system of equations \n" ); document.write( "x + y = 36 \n" ); document.write( "and \n" ); document.write( "x - 3y = 12 \n" ); document.write( "Lets set the first equation equal to x \n" ); document.write( "x + y = 36 \n" ); document.write( "x = 36 - y \n" ); document.write( "Ok so if x equals 36-y we can substitute that into the second equation \n" ); document.write( "x - 3y = 12 \n" ); document.write( "36 - y - 3y = 12 \n" ); document.write( "36 - 4y = 12 \n" ); document.write( "-4y = -24 \n" ); document.write( "y = 6 \n" ); document.write( "Answer: The smaller number is 6 \n" ); document.write( "now we can use this to find the larger number \n" ); document.write( "x + y = 36 \n" ); document.write( "x + 6 = 36 \n" ); document.write( "x = 30 \n" ); document.write( "Answer: The larger number is 30 \n" ); document.write( "Check both answers in both equations \n" ); document.write( "x + y = 36 \n" ); document.write( "30 + 6 = 36 \n" ); document.write( "36 = 36 \n" ); document.write( "that works now try the other equation \n" ); document.write( "x - 3y = 12 \n" ); document.write( "30 - 3(6) = 12 \n" ); document.write( "30 - 18 = 12 \n" ); document.write( "12 = 12 \n" ); document.write( "That works too.\r \n" ); document.write( "\n" ); document.write( " \n" ); document.write( " |