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0ori9=36-4ori?.......................



Răspuns :

0 × 9 = 36 - 4 × 9
0 = 36 - 36
0 = 0

0×9=0
36-4×a=0
36-0=4a
36=4a
a=36:4
a=9
Deci:0×9=36-4×9
0=0