👤

Afla valoarea nr necunoscutdin urmatoarele expresi.
[(38xa+120):25x54]-980=100


Răspuns :

[(38xa+120):25x54]=980+100
[(38xa+120):25x54]=1080
[(38xa+120):25]=1080:54
[(38xa+120):25]=20
(38xa+120)=20x25
(38xa+120)=500
38xa=500-120
38xa=380
a=380:38
a=10