Question

mam gindit la un nr am adaugat 1900 .Din suma am scazut 983.la diferenta am adaugat 1009apoi am scazut 117 Si am obtinut1987.La ce nr mam gindit??

Answer 1

(a+1900)-(983+1009)-117=1987
(a+1900)-1992=1987+117
(a+1900)-1992=2104
a+1900=2104+1992
a+1900=4096
a=4096-1900
a=2196