3x + 4(-7 + 6x) ≤ -7x + 63x + (-28 + 24x) ≤ -7x + 63x - 28 + 24x ≤ -7x + 627x - 28 ≤ -7x + 627x + 7x ≤ 28 + 634x ≤ 34x ≤ 1
Ответ: x ≤ 1.
3x + 4(-7 + 6x) ≤ -7x + 6
3x + (-28 + 24x) ≤ -7x + 6
3x - 28 + 24x ≤ -7x + 6
27x - 28 ≤ -7x + 6
27x + 7x ≤ 28 + 6
34x ≤ 34
x ≤ 1
Ответ: x ≤ 1.