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-2x7= -14
2x(-7) = -14
14:(-2)= -7
-14:(-2)= 7
-14:2= -7
-2x(-3)+5= 6 + 5 = 11
-2+(-3)x5= -2 - 15 = -17
49:(-7)+2= -7 + 2 = -5
-25:5+2x(-3)= -5 - 6 = -11
-4x(-2)+2 = 8 + 2 = 10
jesli mnozysz, lub dzielisz dwie liczby ujemne, wynik otrzymasz zawsze dodatni