👤

2-x-{3-2x-[4-3x-(5-4x)]}

Răspuns :

=2-x-[3-2x-(4-3x-5+4x)]=2-x-(3-2x+1-x)=2-x-4+3x=2x-2=2(x-1)
2-4x-{3-2-[4-3-(5-4)]}=
= 2-4x-0
= 2-4x
=2-4·0
=2-0
=2