DoodlePoodle explains the process very well on the worksheet so I will not go into the details here.
1. In this problem we help get your child started by setting up the two equations that come from the word problem.
The equations are
and when you solve for the unknowns, you get x=62.5 and y=37.5
2. The equations are
and when you solve for the unknowns, you get x=3.125 and y=2.375 (you can just as well do these problems as fractions instead of as decimals)