Réponse :
bonjour
5 x - 8 = - 10
5 x = - 10 + 8
5 x = - 2
x = - 2 /5
- 5 - 7 x = - 3 - 4 x
- 7 x + 4 x = - 3 + 5
- 3 x = 2
x = - 2 /3
6 x + 12 = 5 - x
6 x + x = 5 - 12
7 x = - 7
x = - 1
3 x + 1 + 5 x - 2 = 5
8 x = 5 - 1 + 2
8 x = 6
x = 6/8 = 3 /4
8 x + 7 - 17 x + 9 = 1
- 9 x = 1 - 7 - 9
- 9 x = - 15
x = 15/9 = 5/3
Explications étape par étape :
Bonjour,
g) 5x - 8 = -10
5x= -10 +8
5x= -2
x= -2/5
h) -5 - 7x = -3- 4x
-5+3 = -4x +7x
-2 = 3x
x = -2/3
3(2x + 4) = 5 -x
6x+ 12 = 5-x
6x +x = 5 -12
7x = -7
x= -7/7
x= -1
j) (3x + 1) + ( 5x - 2) = 5
3x+1 +5x -2 = 5
3x+5x = 5 -1+2
8x = 6
x= 6/8 = 3/4
k) (8x + 7)-( 17x- 9) = 1
8x +7 -17x +9 =1
7+9 -1 = 17x -8x
15 =9x
x = 15/9 = 5/3