Question

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

−5(x + 4) + 21 ≥ −3 + 4(x − 8)
−5x − 20 + 21 ≥ −3 + 4x − 32
−5x + 1 ≥ 4x − 35
−9x ≥ −36
x ≥ 4

What mistake did Eduardo make in solving the inequality? (2 points)

He did not make a mistake.
>>> is this one right >>>> When dividing by −9, he did not change the ≥ to ≤.
He subtracted 1 from both sides when he should have added 36.
He subtracted 4x from both sides when he should have added 5x.

Answer 1

You got it right, when dividing -9 he did not change the inequality sign

Answer 2

thank you!!

Answer 3

np