Sara’s house is 100 square feet larger than 2 times Nada's house. If Sara's house is 1000 square feet, how many square feet is Nada's house?
Let’s work this out in a step by step way to be sure we have the right answer.
450
Let the number of square feet in Nada's house be y.

2y + 100 = 1000.

2y = 900.

Meaning, y = 450 square feet.

.

So, the final answer is 450