<PRE><B>Question 895291</B>
x + y = 28


In terms of y, Martha scores in the first game. 

Solve x + y = 28 for y.

y = 28 - x


In terms of x, Martha scores in the second game. 


Solve x + y = 28 for x.


x = 28 - y


Did you follow?</PRE>