\

The sentence is “A number minus by 10 is 27”

Let n be the number

The word minus indicates subtraction, and the symbol is

Thus, the numerical expression is “”

The equation is \ \

Addition property of equality: If a = b then a + c = b + c.

          (Add 10 to both sides)

                    (Additive inverse property: )

                          (Additive identity property: )

                                  (Add: )

The value of the expression is 37.