Answer:
Jerry has a number of 39, and Mary has a number of 50.
Step-by-step explanation:
Let's say mary's number is x, and jerry's is y.
x-y=11 and y+x=89. This means if we subtract 11 from 89 we get jerry's number times 2, which is 78. 78 divided by 2 is 39.
Jerry has a number of 39
and Mary has a number of 50.
