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k/7=n
b) a=k+6
a-6=k
c) z=7-y
-y=7-z //: (-1)
y=-7+z
d) d=a+bc //:b
d/b=a/b+c
d/b-a/b=c
e) x= 2k+1 //:2
x/2=k+1/2
x/2-1/2=k
f) 2k=7n+5 //: 7
2k/7=n+5/7
2k/t-5/7=n
k
-=n
7
b). a=k+6 |-6
a-6=k
c).c=7-y |-7
c-7=-y |*(-1)
-c+7=y
d).
d=a+bc |-a
d-a=bc |/b
d-a
---=c
b
e).
x=2k+1 |-1
x-1=2k |/2
x-1
----=k
2
f).
2k=7n+5 |-5
2k-5=7n |/7
2k-5
----=n
7
---- - kreska ułamkowa
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