Question

a) 4x-2=3
b) x-2x=5+1
c) 4+3-2x=0
d)-2x+1=4x
e) 6x-12=2x
f)-x+2x=x
g)3x-9=6x
h)3+5=2x+1
pfvr preciso dessas repostas até 12:00 de hj (04/02)​

Answer 1

a) 4x - 2 = 3

4x = 3 + 2

4x = 5

x = 5/4

b) x - 2x = 5 + 1

-x = 6 (-1)

x = -6

c) 4 + 3 - 2x = 0

-2x = -3 - 4

-2x = -7

x = -7 / -2

x = 7/2

d) -2x + 1 = 4x

-2x -4x = -1

-6x = -1

x = -1/-6

x = 1/6

e) 6x - 12 = 2x

6x - 2x = 12

4x = 12

x = 12/4

x = 3

f) -x + 2x = x

x = x

x - x = 0

0 = 0

g) 3x - 9 = 6x

3x -6x = 9

-3x = 9

x = 9/-3

x = -3

h) 3 + 5 = 2x + 1

8 = 2x + 1

8 - 1 = 2x

7 = 2x

x = 7/2

Answer 2

Olá....

Resolução:

a)

4x - 2 = 3

4x = 3 + 2

4x = 5

x = 5/4

b)

x - 2x = 5 + 1

- x = 6⇒(- 1)

x = - 6

c)

4 + 3 - 2x = 0

7 - 2x = 0

- 2x = - 7⇒(- 1)

2x = 7

x = 7/2

d)

- 2x + 1 = 4x

- 2x - 4x = - 1

- 6x = - 1⇒(- 1)

6x = 1

x = 1/6

e)

6x - 12 = 2x

6x - 2x = 12

4x = 12

x = 12/4

x = 3

f)

- x + 2x = x

x = x

x ∈ |R

g)

3x - 9 = 6x

3x - 6x = 9

- 3x = 9 ⇒(- 1)

3x = - 9

x = - 9/3

x = - 3

h)

3 + 5 = 2x + 1

8 = 2x + 1

- 2x = 1 - 8

- 2x = - 7⇒(- 1)

2x = 7

x = 7/2

Boas lições.