Résoudre les équations: (x+5)×2+3=5x-7 4 (x+1)=2 (x+5)

(x + 5) * 2 + 3 = 5x - 7
2x + 10 + 3 = 5x - 7
2x + 13 = 5x - 7
13 + 7 = 5x - 2x
20 = 3x
20/3 = x

4(x + 1) = 2(x + 5)
4x + 4 = 2x + 10
4x - 2x = 10 - 4
2x = 6
x = 6/2
x = 3