Question

ajudem-me!

1- 5x + 14 = 5x -1

2- 3. (x +2) + 5 = x +12

3- x + 4 (x -1) = 9 - 2 (x +3)

4- 5. (3x -2) = 2. (6x +3)

5- 2. (3x -1) + 2. (3 -x) = 0

6- 7. (x -1) = 2 (3x +1)

7- 2. (3- y) + 7. (2 -y) = 15 - 4y

Answer 1

Resposta:

5,3

Explicação passo-a-passo:

5.(3x - 2) = 2.(6x + 3)

15x - 10 = 12x + 6

(15-12)x = 10+6

3x=16

x=16/3

x=5,3

16:3

15  5,3...

010

  9

    1...

espero ter ajudado.

Answer 2

Oi....

1)

5x + 14 = 5x - 1

5x - 5x = - 1 - 14

0 = - 15

A afirmação é falsa

2)

3.(x + 2) + 5 = x + 12

3x + 6 + 5 = x + 12

3x + 11 = x + 12

3x  - x = 12 - 11

2x = 1

x = 1/2

3)

x + 4(x - 1) = 9 - 2(x + 3)

x + 4x - 4 = 9 - 2x - 6

5x - 4 = 3 - 2x

5x + 2x = 3 + 4

7x = 7

x = 7/7

x = 1

4)

5.(3x - 2) = 2.(6x + 3)

15x - 10 = 12x + 6

15x - 12x = 6 + 10

3x = 16

x = 16/3

5)

2.(3x - 1) + 2.(3 - x) = 0

6x - 2 + 6 - 2x = 0

4x + 4 = 0

4x = - 4

x = - 4/4

x = - 1

6)

7.(x - 1) = 2(3x + 1)

7x - 7 = 6x + 1

7x - 6x = 1 + 7

x = 8

7)

2.(3 - y) + 7.(2 - y) = 15 - 4y

6 - 2y + 14 - 7y = 15 - 4y

- 9y + 20 = 15 - 4y

- 9y + 4y = 15 - 20

- 5x = - 5 ⇒( - 1)

5x = 5

x = 5/5

x = 1

Bons estudos.