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Sagot :

VINS

bonjour

a) x + 1 = 5

   x = 5 - 1

   x = 4

c ) 3 x - 4 = 2 x + 5

    3 x - 2 x = 5 +  4

     x = 9

b )  5 x = 1

       x = 1 /5

d)  12 x - 4 = 9 x + 2

    12 x - 9 x = 2 + 4

    3 x  = 6

    x = 6 /3 = 2

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Réponse :

Bonjour

Explications étape par étape

A) x +1 = 5

x = -1 +5

x = 4

b) 5x = 1

x = 1/5

c) 3x -4 = 2x +5

c) 3x -2x = +4 +5

c) x = 9

d) 4 (3x -1) = 9x +2

d) 12x -4 = 9x +2

d) 12x -9x = +4 +2

d) 3x = 6

d) x = 6/3 = 2

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