Question

Afla numărul necunoscut: a+(980+796)=4000, (2901+6156)-b=5435, c-(10000-8903)=3679, (9980-7675)-d =980.

Answer 1

a+(980+796)=4000
a+1776=4000
a=4000-1776
a=2224

(2901+6156)-b=5435
9057-x=5435
-x=5435-9057
-x=-3622
x=3622

c-(10000-8903)=3679
c-1097=3679
c=3679+1097
c=4776


(9980-7675)-d =980
2305-d=908
-x=980-2305
-d=-1325
-d=-1325
d=1325