Question

faça as seguintes equações:

1) *2x-2<x*

2) *6x+12>4-10*

3) *8-5x<7x+5*

4) *-3•(x+2)-x>18*
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Answer 1

Resposta:

01) 2x - 2 < x

2x - 2 + 2 < 0

2x < x + 2

2x - x < 2 - x

x < 2

__________

02) 6x + 12 > 4 - 10

6x + 12 > - 6

6x + 12 - 12 > 0

6x > - 6 - 12

6x > - 18

x > 18÷6

x > - 3

__________

03) 8 - 5x < 7x + 5

8 - 5x - 8 < 7x + 5 - 8

- 5x < 7x - 3

- 5x - 7x < - 3 - 7x

- 12x < - 3

(-12x)(-1) > (-3)(-1)

12x > 3

x > 3 ÷ 12

x > 1/4

__________

04) - 3 . ( x + 2 ) - x > 18

- 4x - 6 > 18

- 4x - 6 + 6 > 0

- 4x > 18 + 6

- 4x > 24

(-4x)(-1) < 24(-1)

4x < - 24

x < - 24 ÷ 4

x < - 6