Bonjour
3x/4 = 5
x = 5 * 4/3
x = 20/3
4x - 3 = 11
4x = 11 + 3
x = 14/4
x = (2 * 7)/(2 * 2)
x = 7/2
7 - 8x = 56
8x = 7 - 56
x = -49/8
6x - 4 = 3x + 14
6x - 3x = 14 + 4
3x = 18
x = 18/3
9 - 2x = 11 + 4x
4x + 2x = 9 - 11
6x = -2
x = -2/6
x = -2/(2 * 3)
x = -1/3