Question

1) -4 < 1-x < 5
2) -1 ≤ 5 - 3x ≤ 1

Answer 1

1) -4<1-х<5

1-х

х=1

-4<1<5 (Ложно)

2) -1 ≤ 5 - 3x ≤ 1

5-3х

3х=5

х=5/3

х=1,(6)

-1 ≤ 1,(6) ≤ 1 (Истинно)