Question

reaolvam as inequecoes:
b) 9x+36>42
c)8x-25<2x+5
d)3(x+2)>5x-12
e)4x+11>3x+15

Answer 1

Resposta:

Explicação passo-a-passo:

b)

9x+36>42

9x > 42 - 36

9x > 6 (:3)

3x > 2

x > 2/3

R.: {x E R / x > 2/3}

c)

8x-25<2x+5

8x - 2x < 5 + 25

6x < 30

x < 30/6

x < 5

R.: {x E R / x < 5}

d)

3(x+2) > 5x-12

3x + 6 > 5x - 12

3x - 5x > - 12 - 6

- 2x > - 18 (-1)

2x < 18

x < 18/2

x < 9

R : {x E R / x < 9}

e)

4x+11>3x+15

4x - 3x > 15 - 11

x > 4

R.: {x E R /x > 4}

Answer 2

Resposta:

Explicação passo-a-passo:

b)

9x+36>42

9x > 42 - 36

9x > 6 (:3)

3x > 2

x > 2/3

R.: {x E R / x > 2/3}

c)

8x-25<2x+5

8x - 2x < 5 + 25

6x < 30

x < 30/6

x < 5

R.:

{x E R / x < 5}

d)

3(x+2) > 5x-12

3x + 6 > 5x - 12

3x - 5x > - 12 - 6

- 2x > - 18 (-1)

2x < 18

x < 18/2

x < 9

R : {x E R / x < 9}

e)

4x+11>3x+15

4x - 3x > 15 - 11

x > 4

R.: {x E R /x > 4}