Question

Resolva as equações : b) - 3x+6=-6x+24 C) 2x-(x+4)=19 d) 2_5x1_3=x-4_5 e) 2(x+6)-9=-4x-(x+1)

Answer 1

Resposta:

Explicação passo-a-passo:

b) - 3x+6=-6x+24

- 3x + 6x = 24 - 6

3x= 18

x = 18/3

x = 6

C) 2x-(x+4)=19

2x - x - 4 = 19

x = 19+4

x = 23

d) 2/5 x 1/3=(x-4)/5

2/15 = (x-4)/5

5.2/15 = x - 4

10/15 (:5)/(:5) = x - 4

2/3 = (x-4)

2 = 3.(x-4)

2 = 3x - 12

2+12 = 3x

14 = 3x

3x = 14

x= 14/3

e) 2(x+6)-9= -4x - (x+1)

2x + 12 - 9 = - 4x - x - 1

2x + 3 = - 5x - 1

2x + 5x = - 1 - 3

7x= - 4

x = - 4/7