Question

pfv pra agora
resolva as equações

Answer 1

Resposta:

Explicação passo-a-passo:

a)

5x- 10 = x/2 + 1/3

MMC (2,3)= 6

6.(5x-10)/6 = (3x + 2)/6

30x - 60 = 3x + 2

30x - 3x = 2 + 60

27x = 62

x = 62/27

b)

x/5 + x/2 + 10 = 3x/2

MMC (5,2)= 10

(2x + 5x + 10.10)/10 = (5.3x)/10

7x + 100 = 15x

100 = 15x - 7x

100 = 8x (:4)

25 = 2x

2x = 25

x = 25/2

c)

5x/3 + 6 = x + 10

5x/3 = x+ 10 - 6

5x/3 = X + 4

5x = 3(x+4)

5x = 3x+ 12

5x - 3x = 12

2x = 12 (:2)

x = 6

d)

x/3 + 20 = x/2 + 40

MMC (3,2)= 6

(2x + 6.20)/6 = (3x + 6.40)/6

2x + 120 = 3x + 240

120 - 240 = 3x - 2x

- 120 = x

x = - 120

e)

3x/4 + x/3 = x/2 + 10

Mmc (4,3,2)= 12

(3.3x + 4x)/12 = (6x + 12.10)/12

9x + 4x = 6x + 120

13x = 6x + 120

13x - 6x = 120

7x = 120

x = 120/7