Объяснение:
1.a) 3x -15 => x -5
1.б) -4x > -16 => x > 4
1.в) 5(x-1) + 7 1 - 3(x+2) => 5x - 5 + 7 1 - 3x + 6 => 8x 1 + 6 + 5 - 7 = 5 => x 5/8
2.a) 3x - 15 < x => x < 15/2 и 4x + 13 12 => 4x -1 => x -1/4 => x ∈ [-1/4, 15/2)
2.б) 2x - 2 > 1 => 2x > 3 => x > 3/2 и 6x x -5 => 5x -5 => x -1 => x ∈ (-∞, -1] ∪ (3/2, +∞)
3.a) 2x - 4 0 => 2x 4 => x 2
3.б) 1+2x 0 => x -1/2 и 3-x 0 x 3
Объяснение:
1.a) 3x
-15 => x 
-5
1.б) -4x > -16 => x > 4
1.в) 5(x-1) + 7
1 - 3(x+2) => 5x - 5 + 7 
1 - 3x + 6 => 8x 
1 + 6 + 5 - 7 = 5 => x 
5/8
2.a) 3x - 15 < x => x < 15/2 и 4x + 13
12 => 4x 
-1 => x 
-1/4 => x ∈ [-1/4, 15/2)
2.б) 2x - 2 > 1 => 2x > 3 => x > 3/2 и 6x
x -5 => 5x 
-5 => x 
-1 => x ∈ (-∞, -1] ∪ (3/2, +∞)
3.a) 2x - 4
0 => 2x 
4 => x 
2
3.б) 1+2x
0 => x 
-1/2 и 3-x 
0 x 
3