Réponse :
Explications étape par étape
a/ 1/3 x = 7
⇔ x = 7 / (1/3)
⇔ x = 7 . 3
⇔ x = 21
b/ 3/2 x = 4/3
⇔ x = (4/3) / (3/2)
⇔ x = 4/3 . 2/3
⇔ x = 8/9
c/ [tex]\frac{2x-3}{2}[/tex] = 5 x - 1
⇔ 2x - 3 = 2 (5x - 1 )
⇔ 2x - 3 = 10x -2
⇔ -8x = 1
⇔ x = - 1/8
d/ 2 ( 4x - 2/3 ) = 6x - 1/3
⇔ 8x - 4/3 = 6x - 1/3
⇔ 2x = -1/3 + 4/3
⇔ 2x = 3/3
⇔ 2x = 1
⇔ x = 1/2
