Question

A)x+3=7

B)2x-5=x+4

C)9-4x-4=x+7-1

D)16x+5-3=-2x-15

E)-x+40=4x

F)4x-12=-x+18

Answer 1

Resposta:

$x + 3 = 7 \\ x = 7 - 3 \\ x = 4 \\ \\ 2x - 5 = x + 4 \\ 2x - x = 4 + 5 \\ x = 9$

$9 - 4x - 4 = x + 7 - 1 \\ 5 - 4x = x + 6 \\ - 4x - x = 6 - 5 \\ - 5x = 1 \\ x = 1/ - 5 \\ x = - 0,2$

$16x + 5 - 3 = - 2x - 15 \\ 16x + 2x = - 15 - 5 + 3 \\ 18x = - 17 \\ x = - 17/18$

$- x + 40 = 4x \\ - x - 4x = - 40 \\ - 5x = - 40 \\ x = - 40/ - 5 \\ x = 8$

$4x - 12 = - x + 18 \\ 4x + x = 18 + 12 \\ 5x = 30 \\ x = 30/5 \\ x = 6$

• Espero ter ajudado.

Answer 2

a)

x + 3= 7

x= 7 - 3

x= 4

x= 4/1

x= 4

b)

2x - 5= x + 4

2x - x= 4 + 5

1x= 9

x= 9/ 1

x= 9

c)

9 - 4x - 4= x + 7 - 1

- 4x - x= 7 - 1 - 9 + 4

- 5x= 1

x= 1/ - 5

d)

16x + 5 - 3= - 2x - 15

16x + 2x= - 15 - 5 + 3

18x= - 17

x= - 17/ 18

e)

- x + 40= 4x

- x - 4x= - 40

- 5x= - 40

x= - 40/ - 5

x= 8

f)

4x - 12= - x + 18

4x + x= 18 + 12

5x= 30

x= 30/ 5

x= 6