potrzebuje !!!
1/2x=-1/4+1/2 x2
4x=-4-y
x=-1/2+1
4(-1/2+1)=-4-y
-2+4=-4-y
2=-4-y
x=1/2
2+4=y
6=y
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1/2x=-1/4+1/2 x2
4x=-4-y
x=-1/2+1
4x=-4-y
x=-1/2+1
4(-1/2+1)=-4-y
x=-1/2+1
-2+4=-4-y
x=-1/2+1
2=-4-y
x=1/2
2+4=y
x=1/2
6=y