# me ajudem a responder?1) 3 (x-2)=5x -42) 4x-2=103) 3x -2= 104) 4x-2=30 5)5(x+2)=3(x+2)

2
por marina1247

## Respostas

2013-06-12T14:14:00-03:00

2013-06-12T19:53:03-03:00

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

3x - 6 = 5x - 4

3x - 5x = - 4 + 6

-2x = 2

x  = -1

2) 4x - 2 = 10

4x = 10 + 2

4x = 12

x = 12/4

x = 3

3) 3x - 2 = 10

3x = 10 + 2

3x = 12

x = 12/3

x = 4

4) 4x - 2 = 30

4x = 30 + 2

4x = 32

x = 32/4

x = 8

5) (x + 2) = 3(x + 2)

x + 2 = 3x +6

x - 3x = 6 - 2

- 2x = 4

x = 4/2

x = - 2