Sagot :
Bonjour,
5x-4x = 8+7
x = 15
10 +8 = 7x -2x
18 = 5x
x= 18/5
2x+ 8 -5 = 7x-9
8-5 +9 = 7x -2x
12 = 5x
x= 12/5
Soit
2x+1 = 0
2x= -1
x= -1/2
Soit:
x-5 = 0
x= 5
Bonjour,
5x-4x = 8+7
x = 15
10 +8 = 7x -2x
18 = 5x
x= 18/5
2x+ 8 -5 = 7x-9
8-5 +9 = 7x -2x
12 = 5x
x= 12/5
Soit
2x+1 = 0
2x= -1
x= -1/2
Soit:
x-5 = 0
x= 5