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2.4-(-2)=6
3.2/3 (a -1)= 2/3( -2-1)= 2/3( -2+(-1))= 2/3 * (-3)= -2
no to będzie C
4-a= 4 - (-2)= 4 +2= 6
2/3 (a -1)= 2/3( -2-1)= 2/3( -2+(-1))= 2/3 * (-3)= -2
odp C