Răspuns:
=(7x6/a x8)+54-27=83
(42/a*8)+54-27=83
336/a+54-27=83
336/a+27=83
336/a=83-27
336/a=56
336=56a
56a=336
a=6
Verificat.Raspuns corect...............……………100%.
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Explicatie:asata-i e o metoda
