Question

Решить двойное неравенство - 3 < 3 - 2x < 1.

Answer 1

$<var>- 3 < 3 - 2x < 1 \\ \\ - 3-3 < 3 - 2x-3 < 1-3 \\ \\ - 6 < - 2x < -2 \\ \\ 3>x>1 \\ \\ x\in (1;\ 3)</var>$

Answer 2

- 3 < 3 - 2x < 1

- 3 -3<  - 2x < 1-3

- 6 < - 2x < -2

1<x<3

(1;3)