Afla numarul necunoscut :

x:2+(105-275:11):4=28


Răspuns :

x:2+(105-275:11):4=28
x:2+(105-25):4=28
x:2+80:4=28
x:2+20=28
x:2=28-20
x:2=8
x=8×2

[tex] \boxed{x=16}[/tex]