Question

4)14x-6<2x-9

5)4x-6>3x-8

6)13-x>4-2x

7)-1+5+>7x+21

8)-5-13+<-10x+9

9)4-6+3<-7x+16. Inequações de primeiro grau

Answer 1

Resposta:

4_

$14x - 6 < 2x - 9 \\ 14x - 2x < - 9 + 6 \\ 12x < - 3 \\ x < \frac{ - 3}{12}$

5_

$4 x - 6 > 3x - 8 \\ 4x - 3x > - 8 + 6 \\ x > - 2$

6_

$13 - x > 4 - 2x \\ - x + 2x > 4 - 13 \\ x > - 9$

7_

$- 1 + 5 > 7x + 21 \\ - 7x > 21 + 5 - 1 \: .( - 1) \\ 7x > - 21 - 5 + 1 \\ 7x > - 25 \\ x > \frac{ - 25}{7}$

8_

$- 5 - 13 < - 10x + 9 \\ 10x < 9 + 5 + 13 \\ 10x < 27 \\ x < \frac{27}{10}$

9_

$4 - 6 + 3 < - 7x + 16 \\ 7x < 16 - 4 + 6 - 3 \\ 7x < 15 \\ x < \frac{15}{7}$