Pouvez vous l’aider Svp c’est pour demain je ne comprend pas

bonsoir
1 ) | x | = 4
|4 | = 4
|- 4 | = 4
| x - 10 | = 1.5
| x - 10 | = x - 10 si x ≥ 0 ⇔ x ≥ 10
x - ∞ 10 + ∞
|x - 10 | - ( x - 10) 0 x - 10
- ( x - 10) = 1.5
- x + 10 = 1.5
- x = 1.5 - 10
- x = - 8.5
x = 8.5
x - 10 = 1.5
x = 1.5 + 10
x = 11.5
S ( 8.5 ; 11.5 )
| x - 3 | = 4
| x - 3 | = x - 3 si x ≥ 0 ⇔ x ≥ 3
x - ∞ 3 + ∞
| x - 3| - ( x - 3 ) 0 x - 3
- ( x - 3 ) = 4
- x + 3 = 4
- x = 4 - 3
- x = 1
x = - 1
x - 3 = 4
x = 4 +3
x = 7
S ( - 1 : 7 )
essaie de continuer