Question

Alguém q sabe fazer essas conta preciso muito das respostas!!
Ajudem. :/

Answer 1

a) 7(x-1) < 5 - 2x

7x - 7 < 5 - 2x

7x + 2x < 5 + 7

9x < 12

x < 12/9

x < 12/9

b) 10x -1 <= 4(x+1)

10x -1 <= 4x + 4

10x -4x <= 4 + 1

6x <= 5

x <= 5/6

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

6x - 12 + 6x > 0

12x > 12

x > 12/12

x > 1

d) 3(x-2) < 5x - 8

3x - 6 < 5x - 8

8 - 6 < 5x - 3x

2 < 2x

1 < x

e) 2(x-3) + 3(x-1) <= 36

2x - 6 + 3x - 3 <= 36

5x <= 36 + 9 = 45

x <= 45/5

x <= 9

f) 3(x-1) -2(x+1) >= -9

3x - 3 -2x -2 >= -9

x >= -9 +3+2

x >= -4

g) 2x - 2 > x

2x - x > 2

x > 2

h) 6x + 12 >= 4

6x >= 4 - 12 = -8

x >= -8/6

i) 8 - 5x <= 7x

8 <= 5x+7x = 12x

8/12 <= x

j) -3(x+2)-x > 18

-3x - 6 -x > 18

-4x > 18+6=24

x < -6

k) 3(x+1) < -2(x-1) + 15

3x + 3 < -2x + 2 + 15

3x + 2x < -3 + 2 + 15

5x < 14

x < 14/5