What's the number when the quotient of a number and - 7 decreased by 2 is 10?

Let's read through this and make an equation:

? ("number")

? / - 7 ("quotient of a number and - 7")

(? / - 7) - 2 ("decreased by 2")

(? / - 7) - 2 = 10 ("is 10")

Now we can solve:

(? / - 7) - 2 = 10

? / - 7 = 12

? = - 84

The number is - 84