Question

Resolva as equações:​

Answer 1

Resposta:

letra a)

x + 1/2 = 3/2

x= 3/2 - 1/2

x=1

letra b)

x/7 = -2

7 x x/7 = 7x2

x= -14

letra c)

-9x + 8= 43

-9x = 43-8

-9x = 51

x=17/3

letra d)

x- 3 (4 - x) = 7x - (1-x)

x- 12 + 3x= 7x - 1 +x

-12 + 3x = 7x - 1

3x - 7x = -1 +12

-4x = 11

x= - 11/4

letra e)

x/4 - 7/10 = 2x/5 -1

5x - 14 = 8x - 20

5x - 8x = 20 + 14

-3x = -6

x= 2

letra f)

x-1/ 4 + 3x-7/6 = 2x-3/3

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

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

9x - 17 = 8x - 12

9x - 8x = -12 + 17

x= 5

letra g)

x-4/3 - 1 = x - 2/8

8 (x-4) - 24 = 24x - 6

8x - 32 - 24 = 24x - 6

8x - 56 = 24x -6

8x - 24x = -6 + 56

- 16x = 50

x= -25/8