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i=a|2+2|k/*2k
2ik=ak+4
2ik-ak=4
k(2i-a)=4/:(2i-a)
k=4|2i-a
zad.2
a.) t=x|a-5x/*a
at=x-5ax
x-5ax=at
x(1-5a)=at/:(1-5a)
x=at|1-5a
b.)p=a+x+ax
a+x+ax=p
x+ax=p-a
x(1-a)=p-a/:(1+a)
x=p-a|1+a
c.) m=(x+1)p-3x
m=px+p-3x
px+p-3x=m
px-3x=m-p
x(p-3)=m-p/:(p-3)
x=m-p|p-3
d.) w=1|x+p/*x
wx=px/:w
x=px|w