Answer: 
Step-by-step explanation:
Let be
the total amount of miles that the kangaroo hopped to the lake.
According to the information given in the exercise, you know the following:
1. The distance the kangaroo hopped with her baby in her pounch is 5,203 yards:

2. The distance the kangaroo hopped without her baby in her pounch is 2,805 yards:

Therefore, in order to calculate the value of
, you only need to add
and
.
Then, trough this procedure, you get the following result:
