Question

a) 3 + x = 1 b) x – 2 = 2
c) 4x + 5 = 25 d) 5x = 30 + 3x
e) 4x + 10 = 45 – 3x f) 2x – 8 = 10
g) 5x – 6 = 2x + 3 h) 3x + 2x + 1 = 6
i) x + 30 – 6x = – 10 j) 7x – 13 = 9 – 5x

Answer 1

a) 3 + x = 1

x = 1 - 3

x = -2

b) x - 2 = 2

x = 2 + 2

x = 4

c) 4x + 5 = 25

4x = 25 - 5

4x = 20

x = 20/4

x = 5

d) 5x = 30 + 3x

5x - 3x = 30

2x = 30

x = 30/2

x = 15

e) 4x + 10 = 45

4x = 45 - 10

4x = 35

x = 35/4

f) 2x - 8 = 10

2x = 10 + 8

2x = 18

x = 18/2

x = 9

g) 5x - 6 = 2x + 3

5x - 2x = 3 + 6

3x = 9

x = 3

h) 3x + 2x + 1 = 6

3x + 2x = 6 - 1

5x = 5

x = 1

i) x + 3 - 6x = - 10

x - 6x = -10 - 3

-5x = -13

x = 13/5

j) 7x - 13 = 9 -5x

7x + 5x = 9 + 13

12x = 22

x = 22/12

x = 11/6

Espero ter ajudado

Answer 2

Explicação passo-a-passo:

a) 3 + x = 1

$x = 1 - 3 \\ x = - 2$

_____________

b) x – 2 = 2

$x = 2 + 2 \\ x = 4$

_____________

c) 4x + 5 = 25

$4x = 25 - 5 \\ 4x = 20 \\ x = \frac{20}{4} \\ x = 5$

_______________

d) 5x = 30 + 3x

$5x - 3x = 30 \\ 2x = 30 \\ x = \frac{30}{2} \\ x = 15$

________________

e) 4x + 10 = 45 – 3x

$4x + 3x = 45 - 10 \\ 7x = 35 \\ x = \frac{35}{7} \\ x = 5$

_______________

f) 2x – 8 = 10

$2x = 10 + 8 \\ 2x = 18 \\ x = \frac{18}{2} \\ x = 9$

________________

g) 5x – 6 = 2x + 3

$5x - 2x = 3 + 6 \\ 3x = 9 \\ x = \frac{9}{3} \\ x = 3$

________________

h) 3x + 2x + 1 = 6

$3x + 2x = 6 - 1 \\ 5x = 5 \\ x = \frac{5}{5} \\ x = 1$

_________________

i) x + 30 – 6x = – 10

$x - 6x = - 10 - 30 \\ - 5x = - 40 \\ x = \frac{ - 40}{ - 5} \\ x = 8$

_________________

j) 7x – 13 = 9 – 5x

$7x + 5x = 9 + 13 \\ 12x = 22 \\ x = \frac{22}{12}$

x= 11/6

Espero ter ajudado!