Question

A. STEP 1B. STEP 2C. BETSIE DID NOT MAKE A MISTAKE

Answer 1

From the given problem :

`3(a+7)=-33`

Divide both sides by 3

`a+7=-11`

From here, we can say that STEP 1 is correct.

Next is to subtract 7 from both sides of the equation

`\begin{gathered} a+7-7=-11-7 \\ a=-18 \end{gathered}`

Now, we can say that Betsie made a mistake on STEP 2.

Therefore, the answer is B. STEP 2