Izabela019ask
a fost răspuns

in fiecare cazuri,aflati numarul necunoscut a)34-2•(2660+76:x):893=28
b)51-(2660:76+x):23=28

Răspuns :

Jojoi54ask

Răspuns:

34-2•(2660+76:x):893=28

2•(2660+76:x):893=34-28

2•(2660+76:x):893=6

(2660+76:x):893=6:2

(2660+76:x):893=3

(2660+76:x)=3x893

2660+76:x=2679

76:x=2679-2660

76:x=19

x=76:19

x=4

51-(2660:76+x):23=28

51-(35+x):23=28

(35+x):23=51-28

(35+x):23=23

(35+x)=23x23

35+x=529

x=529-35

x=494