Odpowiedź:
a) 3x = 8+3
x = 11/3
b) 15x = 3 + 7
x = 10/15 = 2/3 = 0,6
c) x = 1 - 3
x = -2
d) 5x/3 = 4
x = 12/5 = 2,4
e) 2(4 - x)/2 = 10
4 - x = 10
x = -6
f) 4x - 20 = 40
4x = 60
x = 15
