1-2x-1=x
-2x-x=1-1
-3x= 0/:-3
x= 0
1-x2+x=x
-x2+x-x=-1
-x2=-1
x2=1
x=pierwiastek z 1
x=1
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1-2x-1=x
-2x-x=1-1
-3x= 0/:-3
x= 0
1-x2+x=x
-x2+x-x=-1
-x2=-1
x2=1
x=pierwiastek z 1
x=1