Question

preciso de ajuda, dou 15 pontos

Answer 1

A-) 5x+3x=16

8x=16

x=16/8

x=2

B-) x + x + 8 = 54

x + x = 54 - 8

2x = 46

x = 46 / 2

x = 23

C-) 7x - 2 - 5x = 18

7x - 5x = 18 + 2

2x = 20

x = 20/2

x = 10

D-) 12x - 10x - 4 = 3

12x - 10x = 3 + 4

2x = 7

x = 7 ou 3,5

2

E-)

-x-2x-4=11

-x-2x=11+4

-3x=15

-x=15/3 (-1)

x=-5

F-)

8x = 5x + 4,5

8x - 5x = 4,5

3x = 4,5

x = 4,5

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3

x = 1,5