Question

-20≤4x-9≤-2

Answer 1

add nine to every side
and you get

-11 ≤ 4x ≤ 7

and how do u do the less than/greater than equal sign?
i copy and pasted yours

Answer 2

ok, thank u

Answer 3

\[-\frac{11}{4}\leq x\leq \frac{7}{4} \]