Question

resolva as equações a seguir.
a) 6x + 2(x - 1) = 14
b) 4x – 2(x – 5) = 10
c) 3(x - 2) +5=5
d) -3x – 3(x – 3) = 3
e) 3x + 4(x + 2) = 2(x + 9).
f) 2(x – 6) + 7x = 5 - 3(x - 2).​

Answer 1

Olá...

Resolva as equações:

a)

6x + 2(x - 1) = 14

6x + 2x - 2 = 14

8x = 14 + 2

8x= 16

x = 16/8

x = 2

b)

4x – 2(x – 5) = 10

4x - 2x + 10 = 10

2x = 10 - 10

2x = 0

x = 0/2

x = 0

c)

3(x - 2) + 5 = 5

3x - 6 + 5 = 5

3x -1 = 5

3x = 5 + 1

3x = 6

x = 6/3

x = 2

d)

- 3x – 3(x – 3) = 3

- 3x - 3x + 9 = 3

- 6x + 9 = 3

- 6x = 3 - 9

- 6x = - 6 ⇒( - 1)

6x = 6

x = 6/6

x = 1

e)

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

3x + 4x + 8 = 2x + 18

7x + 8 = 2x + 18

7x - 2x = 18 - 8

5x = 10

x = 10/5

x = 2

f)

2(x – 6) + 7x = 5 - 3(x - 2)

2x - 12 + 7x = 5 - 3x + 6

9x - 12 = 11 - 3x

9x + 3x = 11 + 12

12x = 23

x = 23/12

Bons estudos.