Réponse :
Bonjour,
-2x+3 = 5x-7
→-2x +3 -3 = 5x-7-3
→ -2x = 5x-10
→ -2x-5x = 5x-10-5x
→ -7x = - 10
→ 7x = 10
→ x = 10/7
Bonne journée.
