Question

Solve the inequality and type the solution in interval notation. No spaces!
-25 ≤ -3x - 4<-13

Answer 1

-25 ≤ -3x - 4<-13
-21 ≤ -3x < -9
9 ≤ x < 3

Answer 2

$$-25\le-3x-4\lt-13\\-21\le-3x\lt-9\text{ by adding 4 to each "side"}\\7\ge x\gt3\text{ or, equivalently, }3<x\le7$$This may also be expressed in interval notation as \(x\in(3,7]\).