The sum of a equation and 35 is 100. create an equation solve, and tell what that number was

The sum of a number and 35 is 100. Create an equation and solve, and tell what the number was.

Let's call our number n. Our equation is

n + 35 = 100

We can subtract 35 from each side to get

n + 35 - 35 = 100 - 35

n = 65