pouvez-vous m'aider je n'arrive pas à faire cet exercice Stp a) 2x + 1 = 3. c) 3 = - 3x +1. e) 1/x-1=0. b) – 5x – 2 = 4. d) 2 = 3x - 1. f) 10x

Salut,

a) 2x + 1 = 3

   2x = 3 - 1 = 2

   x = 2/2 = 1

b) -5x - 2 = 4

   -5x = 4 + 2 = 6

    x = -6/5

c) 3 = -3x + 1

   3 - 1 = -3x

   2 = -3x

  x = -2/3

d) 2 = 3x - 1

   2 + 1 = 3x

   3 = 3x

   x = 3/3 = 1

e) 1/x - 1 = 0

   1/x = 1

   x = 1/1 = 1

f) 10x - 5 = 7

  10x = 7 + 5 = 12

  x = 12/10 = 6/5

Bonjour,

-3x + 1 = 3

-3x = 3 - 1

-3x = 2

x = -2/3

1/x - 1 = 0

1/x = 1

x = 1 * 1  = 1

-5x - 2 = 4

-5x = 4 + 2

-5x = 6

x = -6/5

2 = 3x - 1

2 + 1 = 3x

3 = 3x

x = 3/3 = 1

10x - 5 = 7

10x = 7 + 5

10x = 12

x = 12/10 = 6/5