document.write( "Question 167392: if the average (arithmetic mean) of 5 consecutive integers is 12. what is sum of the least and greatest of the 5 integers ? \n" ); document.write( "
Algebra.Com's Answer #123290 by gonzo(654)\"\" \"About 
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let x = first number.
\n" ); document.write( "x+1
\n" ); document.write( "x+2
\n" ); document.write( "x+3
\n" ); document.write( "x+4
\n" ); document.write( "= the other 4 numbers.
\n" ); document.write( "the average = sum of the total divided by 5.
\n" ); document.write( "sum of the total is 5x + 10
\n" ); document.write( "(5x+10)/ 5 = (x+2)
\n" ); document.write( "average is (x+2)
\n" ); document.write( "-----
\n" ); document.write( "x+2 = average = 12
\n" ); document.write( "subtract 2 from both sides of equation.
\n" ); document.write( "x = 10
\n" ); document.write( "-----
\n" ); document.write( "first number in series is x = 10
\n" ); document.write( "last number in series is x + 4 = 14.
\n" ); document.write( "-----
\n" ); document.write( "sum of 10 + 14 = 24.
\n" ); document.write( "-----
\n" ); document.write( "to prove answer is correct, substitute 10 for x
\n" ); document.write( "x = 10
\n" ); document.write( "x+1 = 11
\n" ); document.write( "x+2 = 12
\n" ); document.write( "x+3 = 13
\n" ); document.write( "x+4 = 14
\n" ); document.write( "----
\n" ); document.write( "sum of 10+11+12+13+14 = 60
\n" ); document.write( "average = 60 / 5 = 12
\n" ); document.write( "smallest number is x = 10
\n" ); document.write( "largest number is x + 4 = 14
\n" ); document.write( "-----
\n" ); document.write( "answer looks good.
\n" ); document.write( "x = 10
\n" ); document.write( "x + 4 = 14
\n" ); document.write( "sum = 24
\n" ); document.write( "-----\r
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