C.) 5, Using P.E.M.D.A.S you have to multiply first, so replacing the variable X with 5, it should look like this: (6*5) -3=27. 6*5 is 30, 30 subtracted by 3 is 27.
An open sentence is one that becomes true (or false in varying scenarios). In this situation, that means that you would want the equation to be 27 = 27.
Therefore, the correct answer is C. 5.
This is because it creates the equation 30 - 3 = 27 which simplifies to 27=27.
