Răspuns :
[ 21 600-1875×(100-91)]:675
= (21600 - 1875 × 9) : 675 = (21600 - 16875) : 675 = 4275 : 675 = 7
[21600-1875x(100-91)]:675=
(21600-1875x9):675)=
(21600-16875):675=
4725:675=7
(21600-1875x9):675)=
(21600-16875):675=
4725:675=7