- 3,25 ≤ (1 - 4х)/3 < 1.25
- 3.25 * 3 ≤ 1 - 4x < 1.25 * 3<br> - 9.75 ≤ 1 - 4x < 3.75<br>- 9.75 - 1 ≤ - 4x < 3.75 - 1<br>- 10.75 ≤ - 4x < 2.75 | * (-1)
10.75 ≥ 4x > 2.75
10.75/4 ≥ x > 2.75/4
2.6875 ≥ x > 0.6875
0.6875 < x ≤ 2.6875
x∈ ( 0.6875 ; 2,6875 ] ⇒ 1 ; 2 ⇒ два целых числа