Question

Ce numar si-a ales George daca il aduna cu 7 , inmulteste suma cu 9 ,adauga la produs 3 si de 3 ori , scade 149 , imparte la 100 diferenta si obtine 4 ?

Answer 1

{[(x+7)*9+3]-3*149}:100=4
[(x+7)*9+3]-447=4*100
[(x+7)*9+3]-447=400
(x+7)*9+3=400+447
(x+7)*9+3=847
(x+7)*9=847-3
(x+7)*9=844
x+7=844:9
x+7=93,777 777 7778
x=93,777 777 7778-7
x=86,777 777 7778

Verificare
86,777 777 7778+7=93, 777 777 7778
93,777 777 778 *9=844
844+3=847
847-447=400
400:100=4