zapisz w najprostszej postaci
x-{1-[x-(1-x)-(x-1)+x]-(x-1)}=
x-{1-[x-1+x-x+1+x]-x+1}= x-(1-x+1-x+x-1-x-x+1)= x-1+x-1+x-x+1+x+x-1=4x-2
Proszę :)
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x-{1-[x-1+x-x+1+x]-x+1}= x-(1-x+1-x+x-1-x-x+1)= x-1+x-1+x-x+1+x+x-1=4x-2
Proszę :)