Question 253433
j+m=59
j-m=33
add 
2j=92
j=46
m=13

m+j=59
m-j=33
2m=92
m=46
j=13

We can only tell the ages are 59 and 13 but not who is 59 and who is 13
If john is the younger then he is 13 and mary is 46