A math class is having a discussion on how to determine if the expressions 4 x minus x + 5 and 8 minus 3 x minus 3 are equivalent using substitution. The class has suggested four different methods. Which describes the correct method?

Both expressions should be evaluated with one value. If the final values of the expressions are the same, then the two expressions must be equivalent.  

Step-by-step explanation:

The answer is:

B. Both expression should be evaluated with one value if the final values of the expressions are the same then the two expressions must be equivalent