The sentence is, three less than twice a number is at most 5.

Let n be the number

The word “twice” indicates multiplication by 2. So, twice a number is .

The word “at most” indicates the symbol “”

The word “less than” can be represented as “<” symbol.

Rewrite the sentence into expression as,

The inequality is .

Apply subtraction property of inequality: Subtract 3 from each side.

                 (Subtract: )

                 (Apply Commutative property: )

                       (Apply Additive inverse property: )

                          (Apply Additive identity property: )

                  (Divide each side by 2)

                         (Cancel common terms)

               (Multiply each side by negative one and flip the symbol)

                         (Product of two same signs is positive)

The inequality is .