bonsoir, quelqu’un pour m’aider en maths « resoudre une équation » svp merci d’avance

1) 8x + 5 = 20
8x = 15
x = 15/8
x = 1,875

Verification : 8*1,875 + 5 = 20

2) 5x - 2 = 36
5x = 38
x = 38/5
x = 7,6

Verification : 5*7,6 - 2 = 36

3) 4x + 12 = 0
4x = -12
x = -12/4
x = -3

Verification: 4*(-3) + 12 = 0


4) 5x + 2 = 0
5x = -2
x = -2/5
x=0,4

Verification: 5*0,4 + 2 = 0

5) 2x + 8 = 2
2x = -6
x = -6/2
x = -3

Verification: 2*(-3) + 8 = 2

6) 4x + 1 = 12
4x = 11
x = 11/4
x = 2,75

Verification : 4*2,75 + 1 = 12