1) A) 7 - 4x < 6x - 23
-4x-6x < -23-7
-10x < -30| : (-10)
x > 3
Б) - (4 - 5x) + 2(3 + x) < 2
-4 +5x + 6 + 2x < 2
5x +2x < 2+4-6
7x < 0| : 7
x < 0
2) {5x + 3 ≤ 6x +7
{x - 1 ≤ 5 - x
{5x - 6x ≤ 7 - 3
{x + x ≤ 5 + 1
{-x ≤ 4| * (-1)
{2x ≤ 6| : 2
{x ≥ -4
{x ≤ 3