Question

Resolva as equações:

A)6x=2x+180

B)9x-7=5x+13

C)7x=4x+5

D)6x=18

E)5X=-30

F)10x-3x+1=1-4x+3

G)20-5-x=2X-3-1

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Answer 1

Resposta:

a) 6x = 2x + 180

6x - 2x = 180

4x = 180

x = 45

b) 9x - 7 = 5x + 13

9x - 5x = 13 + 7

4x = 20

x = 5

c) 7x = 4x + 5

7x - 4x = 5

3x = 5

x  ≅ 1,6

d) 6x = 18

x = 3

e) 5x = -30

x = -6

f) 10x - 3x + 1 = 1 - 4x + 3

10x - 3x + 4x = 1 - 1 + 3

11x = 3

x = 0,27 (dízima periódica)

g) 20 - 5 - x = 2x - 3 - 1

-x + 2x = - 3 - 1 - 20 + 5

x = -19

espero ter ajudado :)

Answer 2

Explicação passo-a-passo:

a- 6x=2x+180

6x-2x=180

4x= 180

x= 180/4

x = 45

b- 9x-7 = 5x+13

9x-5x = 13 +7

4x = 20

x = 20/4

x = 5

c- 7x=4x+5

7x-4x = 5

3x = 5

x = 5/3

d- 6x = 18

x = 18/6

x = 3

e- 5x = -30

x = -30/5

x = -6

f- 10x-3x+1 = 1-4x+3

10x-3x+4x = 1+3-1

11x = 3

x = 3/11

g- 20-5-x = 2x -3 -1

-x -2x = -3 -1 -20 +5

-3x = -19

x = -19/ -3

x = 6,33 ...