Question

Clarence solved the equation 3 x + 15 = 33 and showed the following work. Did he do the work correctly?

3 x + 15 = 33
3 x + 15 - 15 = 33
3 x = 33
=
x = 11

Which of the following is true?

a. x is 11.
b. x should be 6.
c. x should be 16.
d. x should be 99.

Answer 1

Clarence solved the equation incorrectly because he didn't subtract 15 from both sides, just one side. 

Therefore:
      b. x should be 6