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Aflati numerele natutale a ,b si c,daca a×b=45,a×c=72 si b×c=40

Răspuns :

axb=45=>a=45/b
axc=72=>a=72/c
bxc=40=>b=40/c

a=45/b=45c/40=9c/8
72/c=9c/8=>9c²=72x8=>c²=64=>c=8
b=5;a=9