Bonjour,
x/6 = 5+7
x/6 = 12
x= 12*6
x= 72
2x/3 = 21+6
2x/3 = 27
2x = 27*3
2x = 81
X= 81/2
x= 40,5
4x-2x = 3-2
2x = 1
x= 1/2
x= 0,5
2+8 = 2x-x/2
10 = 4x/2 - x/2
10 = 3x/2
3x = 10*2
3x = 20
x = 20/3
