Răspuns :
[(4×5-2+3):7+9]:r=4
[(20-2+3):7+9]:r=4
[(18+3):7+9]:r=4
(21:7+9):r=4
(3+9):r=4
12:r=4
r=12:4
r=3
Sper ca te-am ajutat!!!! (:
[(20-2+3):7+9]:r=4
[(18+3):7+9]:r=4
(21:7+9):r=4
(3+9):r=4
12:r=4
r=12:4
r=3
Sper ca te-am ajutat!!!! (: