Afla numarul necunoscut :


b - 508*350) = 342 521


(815*4070)-c=310072



Răspuns :

b-(508×350)=342521
b-177800=342521
b=342521+177800
b=520321

(815×4070)-c=310072
3317050-c=310072
c=3317050-310072
c=3006978