Question

Micsorand de 4 ori jum.unui nr,adaugand 5 inmultind suma obtinuta cu 4,am scazut din produs 16,impartind la 2 dif obtinutasi adaugand 15 se obtine rezultatul 35.Care este nr?

Answer 1

{[(a/2:4)+5]*4-16}:2+15=35
{[(a/2:4)+5]*4-16}:2=35-15=20
[(a/2:4)+5]*4-16=20*2=40
[(a/2:4)+5]*4=40+16=56
(a/2:4)+5=56:4=14
(a/2:4)=14-5
a/2:4=9
a/2=9*4=36
a/2=36
a=72