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?

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.