Bonjour
1)
a. 5x - 2 = 0
5x = 2
x = 2/5
b. - 8x + 4 = x + 5
- 8x - x = 5 - 4
- 9x = 1
x = - 1/9
c. 5 (x + 1) = - 3x - 10
5x + 5 = - 3x - 10
5x + 3x = - 10 - 5
8x = - 15
x = - 15/8
2)
a. 2x + 10 > 0
2x > - 10
x > - 10/2
x > - 5
b. 4x - 16 ≤ 0
4x ≤ 16
x ≤ 16/4
x ≤ 4
c. - 7x + 3 < 2x - 15
- 7x - 2x < - 15 - 3
- 9x < - 18
x > 18/9
x > 2.
Réponse :
5x-2=0 -8x+4=x+5 5(x+1)= -3x-10
5x=2 -9x=1 5x+5= -3x-10
x=2/5 x= -1/9 x= -15/8
-2x+10>0 4x-16≤0 -7x+3<2x-15
-2x>-10 4x≤16 -9x<-18
x<5 x≤4 x>2
Explications étape par étape :
