Odpowiedź:
a) (x+8)/5 = 20 /*5
x + 8 = 100 / -8
x = 92
b) (x-6)/2 = 4 /*2
x-6 = 8 /+6
x = 14
c) (x+1)/3 = -2 /*3
x+1 = -6 / -1
x = -7
