Question 429983
Let X be Sue's age.  Dale is 4 years older than Sue, or X+4. If the sum of their ages 5 years ago was 64, then:

(X-5)+((X+4)-5)=64
2X-6=64
2X=70
X=35

Therefore, Sue is now 35, Dale is 39.

35+39-10=64.