Question

a) 3x = -7 + x
b) 7x + 1 – 5x = 9
c) 16 – x = x + 25
d) 4(x – 2) = 4 + 2(x – 1)
e) 3(x + 4) = -2(2x + 7)
f) 2x – 6(x + 9) = 4(3 – 2x)

Answer 1

Resposta:

É bem fácil

Explicação passo-a-passo:

a) 3x - x = 7

2x= 7

x= 7/2

x= 3,5

b) 7x - 5x = 9-1

2x = 8

x= 8/2

x= 4

c) -x-x=25-16

-2x= 9

x= -9/2

x= 4,5

d) 4x - 8 = 4 +2x -2

2x = 10

x= 10/2

x = 5

e)  3x + 4 = -4x -14

3x + 4x = -14 -4

7x = -18  .(-1)

7x = 18

x= 18/7

f) 2x -6x -54 = 12 -8x

2x -6x +8x = 12 +54

-4x+8x = 66 .(-1)

4x+8x = 66

12x = 66

x=66/12

x= 5,5

Bons estudos!

Answer 2

Resposta:

a)  $-\frac{7}{2}$

b) 4

c) $- \frac{9}{2}$

d) 5

e) $- \frac{18}{7}$

f)  $\frac{33}{2}$

Explicação passo-a-passo:

a) 3x = -7 + x

3x - x = -7

2x = -7

x= -7/2

b) 7x + 1 – 5x = 9

2x = 9 - 1

x=8/2

x=4

c) 16 – x = x + 25

16 - 25 = x + x

2x = - 9

x= - 9/2

d) 4(x – 2) = 4 + 2(x – 1)

4x - 8 = 4 + 2x - 2

4x - 2x = 4 - 2 + 8

2x = 10

x= 10/2

x=5

e) 3(x + 4) = -2(2x + 7)

3x + 4 = - 4x - 14

3x + 4x = - 14 - 4

7x = - 18

x = - 18/7

f) 2x – 6(x + 9) = 4(3 – 2x)

2x - 6x - 54 = 12 - 8x

- 4x + 8x = 12 + 54

4x = 66

x= 66 / 4

x = 33 / 2