Răspuns:
15
Explicație pas cu pas:
(99-b-3×8)+2×6:2=8×2+5×10
(99-b-24)+12:2=16+50
(99-b-24)+6=66
(99-b-24)=66-6
99-b-24=60
99-b=60+24
99-b=84
b=99-84
b=15
Verific:
(99-15-3×8)+2×6:2=
(84-24)+2×6:2=
60+2×6:2=
60+12:2
60+6=
66✔
