Question

Dintr-un numar se scade 12,7. Diferenta se inmulteste cu 4. Produsul obtinut se aduna cu 2,356 si se obtine suma egala cu 3,556. Determinati numarul.

Answer 1

(x-12,7)4+2,356=3,556
(x-12,7)4=3,556-2,356
(x-12,7)4=1,2
x-12,7=1,2/4
x-12,7=0,3
x=0,3+12,7
x=13

Answer 2

[(a-12,7)ₓ4]₊2,356=3,556(a-12,7=e);=(eₓ4)=3,556-2,356;4e=1,2;e=1,2:4;e=0,3