Andrew solved the following inequality, and his work is shown below:

−4(x + 8) + 25 ≤ −2 + 1(x − 50)
−4x − 32 + 25 ≤ −2 + 1x − 50
−4x − 7 ≤ 1x − 52
−5x ≤ −45
x ≤ 9

What mistake did Andrew make in solving the inequality?

Select one:
a. He subtracted 1x from both sides when he should have added 4x.
b. When dividing by −5, he did not change the ≤ to ≥.
c. He added 7 to both sides when he should have added 52.
d. He did not make a mistake