Question 757538
Joe's age = x
Jane's age = y
x + y = 54
x - y = 22
Add together.
2x    = 76
 x    = 38
Substitute x = 38
in: x + y = 54
    38 + y = 54
         y = 54 - 38
         y = 16
Joe's age = 38 yrs.
Jane's age = 16 yrs.
Hope this helps.
:-)