pomocy podpunkty a b c daje 50 punktów

a)
3x - 8 = 2x + 4 | -2x
x - 8 = 4 | + 8
x = 12
b)
5x - 3 = 4x + 6 | - 4x
x - 3 = 6 | + 3
x = 9
c)
7x - 9 = 6x - 8 | -6x
x - 9 = -8 | + 9
x = 1