You can put this solution on YOUR website! 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?
:
a = the 10's digit
b = the units
then
10a+b = your age
:
"the difference between the two digits is 4"
b - a = 4
" and the mean of the digits is 6." = 6
multiply both sides by 2
a + b = 12
:
Use elimination with these two equations
a + b = 12
-a + b = 4
--------------addition eliminates a, find b
2b = 16
b = 16/2
b = 8
then
a + 8 = 12
a = 4
:
How old is Ryan? 48 yrs old
