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Sagot :

MAUDMARINE

Bonjour

a. 4x - x = 1 + 15

3x = 16

x = 16/3

b. - 5x + x = 18 + 2

- 4x = 20

x = - 20/4

x = - 5

c. 1,2x = 0,4 - 0,3

1,2x = 0,1

x = 0,1/1,2

d. 2/3x - 3/4x = 1/3 - 1/5

40/60x - 45/60x = 20/60 - 12/60

40x - 45x = 20 - 12

- 5x = 8

x = - 8/5.

Réponse :

Explications étape par étape :

4x-15=x+1

=4x-x=15+1

=3x=16

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