Odpowiedzi

2010-03-04T15:27:01+01:00
X=2k+1; k=?
x-1=2k /:2
x-1/2=k

2k=7n+5 ; n=?

2k-5=7n /:7
n= 2k-5/7
2010-03-04T15:28:01+01:00
X=2k+1 k=?
x=2k+1
x-1 = 2k |:2
(x-1):2 = k
k = (x-1):2

2k=7n+5 n=?
2k=7n+5
2k-5 = 7n |:7
(2k-5):7 = n
n = (2k-5):7
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