Nine times a number added to - 5 subtracted from twice the sum of nine times a number and two

Let's denote a variable to the number as x. Then, let's slowly decipher the verbal descriptions into algebraic expressions:

Nine times a number added to - 5: 9x + ⁻5 = 9x - 5

twice the sum of nine times a number and two: 2 (9x+2)

Let's subtract the first expression to the second expression:

2 (9x+2) - (9x - 5)

Next, let's simplify the expression.

18x + 4 - 9x + 5

9x + 9

The final expression would be 9x + 9, or nine times a number added to nine.