Question

5) Aplicar a propriedade distributiva:

a) (x + 2) = 4(x + 6)

b) 8 (x + 3) = 40

c) 12x - 14 (1-x) - 2 (10x + 4) = 0

d) 10 (2x - 1) = 4(x + 4)

e)4x -6(4-x)= 10 + 8 (2x + 1)

f) 10x - 20 (x - 1) = 40 - 30 (x - 2)

g)2 (3x - 7) + 3 (x - 1) = 4 (2x - 3)

h) 6 (X - 3) + 12 (2x + 1) = 24 - 15 (x-4)

alguém poderia me ajudar? ​

Answer 1

Resposta:

a-)

x + 2 = 4x + 24

x - 4x = 24 - 2

- 3x = 22

   x = - 22/3

==========================

b-)

8x - 24 = 40

8x = 40 - 24

8x = 16

 x = 16/8

 x = 2

============================

c-)

12x - 14 + 14x - 20x - 8 = 0

12x + 14x - 20x = 14 + 8

6x = 22

 x = 22/6

x = 11/3

===============================

d-)

20x - 10 = 4x + 16

20x - 4x = 16 +10

16x = 26

  x = 26/16

  x = 13/8

==================================

e-)

4x - 24 + 6x = 10 + 16x + 8

4x  + 6x - 16x  = 10 +  8 + 24

- 6x = 42

 x = - 42/6

 x =  - 42/6

 x = -7

==============================

f-)

10x - 20x + 20 = 40 - 30x + 60

10x - 20x + 30x = 60 - 20

                   20x = 40

                        x = 40/20

                        x = 2

==============================================

g-)

6x - 14 + 3x - 3 = 8x - 12

9x - 8x = -12 + 14 + 3

x =  5

==============================================

h-)

6x - 18 + 24x + 12 = 24 - 15x + 60

6x + 24x + 15x = 24 + 60 + 18 - 12

45x = 90

   x = 90/45

   x = 2