Question

7 ( x - 1 ) < 5 - 2 x

10 x - 1 < 4 ( x + 1 )

3 ( x - 2 ) < 5 x - 8

6 x - 3 ( 4 - 2 x ) > 0

Answer 1

¤ Resposta :
7(x-1) < 5 - 2x
7x - 7 < 5 - 2x
7x + 2x < 5 + 7
9x < 12
x < 12/9....(÷3)
x < 4/3

¤ Resposta :
10x - 1 < 4 ( x + 1 )
10x - 1 < 4x + 4
10x - 4x < 4 + 1
6x < 5
x < 5/6

¤ Resposta :
3(x - 2) < 5x - 8
3x - 6 < 5x - 8
3x - 5x < - 8 + 6
- 2x < - 2...(-1)
x < 2/2
x < - 1

¤ Resposta :
6x - 3 (4 - 2x) > 0
6x - 12 + 6x > 0
6x + 6x > 12
12x > 12
x > 12/12
x > 1