Andrea was chosen to participate in a game show. At the end of the
first round, she had a score of -250. At the end of the second round,
she had a score of 600. How many points did Andrea score during the
second round?

The Second Step.

Step-by-step explanation:

We are given the original equation:

In her first step, Clare distributed both sides:

There are two errors:

First, the product of 5 and 12 is 60 and not 72.

Second, on the right-hand side of the equation, the negative must be distributed to all terms. Hence, the correct result should be:

Instead of what she had obtained.