Question 453653
Let the square footage of home #1 be x and home #2 be y. 
e) If the square footage of y is 200 more than x, then y=x+200.
f) If the combined square footage of homes x and y is 5,000, then x+y=5,000.
g) From parts (e) and (f), we having the following system of equations:
y=x+200
x+y=5,000
Using substitution to solve, we replace the y in the equation x+y=5,000 with y=x+200
From this, we see that  x+(x+200)=5,000.

Solving for x, we see
x+x+200=5,000
2x+200=5,000
2x=5,000-200
2x=4,800
x=2,400

Since x=2,400 and y=x+200, then:
y=2,400+200
y=2,600