Question

Solve 2 ≤ 2x + 4 < 10 for x.

–1 ≤ x < 3
1 < x < 3
–1 < x < 3
1 ≤ x < 3

Answer 1

-1 ≤ x < 3

Explanation:

2 ≤ 2x + 4 < 10

Subtract 4 from all sides

2-4 ≤ 2x + 4-4 < 10-4

-2 ≤ 2x < 6

Divide all sides by 2

-2/2 ≤ 2x/2 < 6/2

-1 ≤ x < 3