Sagot :
Bonjour,
A= -3x-2 = 5x+7
A= -2 = 8x+7
A= -9 = 8x
x= -9/8 = -1.125
B= 2x+4 = 3+4x
B= 4 = 3+2x
B= 1 = 2x
x = 1/2 = 0,5
C= 7x-20 = 8x+10
C= -20 = x +10
C= -30 = x
x = -30
D= 5x+13 = -3+7x
D= 13 = -3 +2x
D= 16 = 2x
x= 16/2 = 8
E= -6x+4 = 12+3x
E= 4 = 12+9x
E= -8 = 9x
X= -8/9
F= 5+9x = 15+2x
F= 5+7x = 15
F= 7x = 10
x= 10/7
Bonne journée.
Salut ,
Réponse :
a) -3x - 2 = 5x + 7
-3x -5x = 7 +2
-8x = 9
= 9/-8 = -1,125
b) 2x + 4 = 3 + 4x
2x -4x = 3 -4
-2x = -1
= -1/-2 = 0,5
c) 7x – 20 = 8x + 10
7x -8x = 10 +20
-x = 30
= 30/-1 = -30
d) 5x + 13 = -3 + 7x
5x -7x = -3 -13
-2x = -16
= -16/-2 = 8
e) -6x + 4 = 12 + 3x
-6x -3x = 12 -4
-9x = 8
= 8/-9
f) 5 + 9x = 15 + 2x
9x -2x = 15 -5
7x = 10
= 10/7