5+2(x-4)=4x+7
Résolvons dans ℝ : 5 + 2·(x -4) = 4x + 7
5 + (2x -8) = 4x + 7
-3 + 2x = 4x + 7
2x = 4x + 10
2x -4x = 10
-2x = 10
x = 10-2
x = -102
▶Solution obtenue : x = -5