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daca a ori b =36si ac =27,atunci calculati a ori (b+c)si a ori (b-c) va rog

Răspuns :

a x b=36
a x c=27
___________le adunam
axb+axc=36+27

a(b+c)=63

axb=36
axc=27
____________le scadem
axb-axc=36-27
a(b-c)=9