Résoudre : 10x+5=5(x-3) Merci

10x + 5 = 5(x - 3)
10x + 5 = 5x - 15
10x - 5x = - 15 - 5
5x = - 20
x = -20/5
x = - 4

S= {- 4}

10x + 5 = 5(x-3)
10x + 5 = 5×x - 5×3
10x + 5 = 5x-15
10x + 5 -5 = 5x - 15 - 5
10x = 5x -20
10x - 5x = 5x - 20 -5x
[tex] \frac{5x}{5} [/tex] = [tex] \frac{-20}{5} [/tex]
x = -4