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 ≥ 1

What mistake did Eduardo make in solving the inequality?

Answer 1

the last step..
-9x >= -36 (you have to divide by a -9 , and when dividing by a negative, the sign changes)
x <= 4

understand ?

Answer 2

yes thxs

Answer 3

ok my best friend can help u @AllTheLonelyKillers

Answer 4

he'll be here any moment

Answer 5

glad I could help :)