wykonaj dodawanie i xzreduguj wyrazy podobne:
5x-(2-x)+(3x-9)=
5x-(2-x)+(3x-9)=5x-2+x+3x-9=9x-11
5x-[2-x]+[3x-9]=
= 5x-2+x+3x-9=
=9x-11
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5x-(2-x)+(3x-9)=5x-2+x+3x-9=9x-11
5x-[2-x]+[3x-9]=
= 5x-2+x+3x-9=
=9x-11