Question

1) Resolva as equações:
a) 4 (x + 1) = 12
b) 2 (3x - 2) = 2
c) 4(x + 3) = 1
d) 4(x - 3) = 2x - 5
e) 2 (x - 1) = 3x + 4
f) 7 (x - 4) = 2x - 3
g) 2 (x + 5) - 4 = 26
h) 3 (2x – 3) + x = 5
i) 3 (x+3) - 5 = 22
j) 4 (2x - 1) = 3 (x + 2)
k) 5 (2x -1) = 3 (x + 10)
1) 7 (x - 2) = 5 (x+3)​

Answer 1

Resposta:

a) x = 2

b) x = 1

c) x = - 2,75

d) x = 3,5

e) x = - 2

f) x = 5

g) x = 10

h) x = 2

i) x = 6

j) x = 0,4

k) x = 5

L) x = 14,5

Explicação passo-a-passo:

a) 4 (x+1) = 12

4x + 4 = 12

4x = 12-4

4x = 8

x = 8/4

x = 2

b) 2 ( 3x - 2) = 2

6x - 4 = 2

6x = 2+4

6x = 6

x= 6/6

x = 1

c) 4(x + 3) = 1

4x + 12 = 1

4x = 1 - 12

4x = -11

x = -11/4

x = -

x = - 2,75

d) 4(x - 3) = 2x - 5

4x - 12 = 2x - 5

4x - 2x = - 5 + 12

2x = 7

x = 7/2

x = 3,5

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

2x - 2 = 3x + 4

2x - 3x = + 4 - 2

- x = 2 ( - ¹ )

x = - 2

f) 7 (x - 4) = 2x - 3

7x - 28 = 2x - 3

7x - 2x = -3 + 28

5x = 25

x = 25/5

x = 5

g) 2 (x + 5) - 4 = 26

2x + 10 - 4 = 26

2x = 26 - 10 + 4

2x = 20

x = 20/2

x = 10

h) 3 (2x – 3) + x = 5

6x - 9 + x = 5

6x + x = 5 + 9

7x = 14

x = 14/7

x = 2

i) 3 (x+3) - 5 = 22

3x + 9 - 5 = 22

3x = 22 - 9 + 5

3x = 18

x = 18/3

x = 6

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

8x - 4 = 3x + 6

8x - 3x = + 6 - 4

5x = 2

x = 2/5

x = 0,4

k) 5 (2x -1) = 3 (x + 10)

10x - 5 = 3x + 30

10x - 3x = 30 + 5

7x = 35

x = 35/7

x = 5

1) 7 (x - 2) = 5 (x+3)

7x - 14 = 5x + 15

7x - 5x = 15 + 14

2x = 29

x = 29/2

x = 14,5