Odpowiedzi

2010-04-07T17:08:09+02:00
A) k=7n ;n
7n = k /: 7
n = k/7

b) a=k+6 ;k
k + 6 = a
k = a - 6

c) z=7-y ;y
7 - y = z
-y = z - 7 /: (-1)
y = -z + 7

d) d=a+bc ;c
a + bc = d
bc = d - a /: b
c = (d - a) : b
2010-04-07T17:08:23+02:00
K=7n:7
k/7=n

a=k+6 /-6
a-6=k

z=7-y /-7
z-7=-y /:-1
-z+7=y

d=a+bc /-a
d-a=bc /:b
d-a/b=c

x=2k+1 /-1
x-1=2k /:2
x-1/2-k

2k=7n+5 / -5
2k-5=7n /:7
2k-5/7=n