document.write( "Question 967285: My age is a number between 30 and 60 the difference between the two digits is 4 and the mean of the digits is 6. How old is Ryan? \n" ); document.write( "

Algebra.Com's Answer #591193 by ankor@dixie-net.com(22740) $\"\"$ $\"About$

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My age is a number between 30 and 60 the difference between the two digits is 4 and the mean of the digits is 6. How old is Ryan?
\n" ); document.write( ":
\n" ); document.write( "a = the 10's digit
\n" ); document.write( "b = the units
\n" ); document.write( "then
\n" ); document.write( "10a+b = your age
\n" ); document.write( ":
\n" ); document.write( "\"the difference between the two digits is 4\"
\n" ); document.write( "b - a = 4
\n" ); document.write( "\" and the mean of the digits is 6.\"
\n" ); document.write( " $\"%28a%2Bb%29%2F2\"$ = 6
\n" ); document.write( "multiply both sides by 2
\n" ); document.write( "a + b = 12
\n" ); document.write( ":
\n" ); document.write( "Use elimination with these two equations
\n" ); document.write( "a + b = 12
\n" ); document.write( "-a + b = 4
\n" ); document.write( "--------------addition eliminates a, find b
\n" ); document.write( "2b = 16
\n" ); document.write( "b = 16/2
\n" ); document.write( "b = 8
\n" ); document.write( "then
\n" ); document.write( "a + 8 = 12
\n" ); document.write( "a = 4
\n" ); document.write( ":
\n" ); document.write( "How old is Ryan? 48 yrs old \n" ); document.write( "

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