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7x(5+9)=cauta7xcasuta+casutaxcasuta
9x(8-4)=casuta 
x4-casuta x casuta



Răspuns :

7*14=7*_+_*_
98=7*7+7*7

9*4=_*4-_*_
36=10*4-2*2

_*4=_*_  cred
4*4=4*4


Ar putea fi posibilitatile astea.