Odpowiedzi

2010-02-21T20:59:56+01:00
90 = 150%x
90 = 1,5x |:1,5
x = 60
1 5 1
2010-02-21T21:00:02+01:00
X=100%
90=150%
.............
x=90×100:150
x=60
to x=60
3 3 3