Question

Peter are o turma de 1632 de capre albe, negre si maro .Stiind ca albe si negre sunt 1200,iar negre si maro sunt 832, afla cate sunt de fiecare fel.

Answer 1

Câte capre maro are?
1632-1200=432
Câte capre negre sunt?
832-432=400
Câte capre albe sunt?
1200-400=800

Answer 2

x–capre albe
y–capre negre
z–capre maro
+y+z=1632
x+y=1200
y+z=832
x=1200–y
z=832–y
1200–y+y+832–y=1632
–2y+y=1632–832–1200
–y=–400|*(–1)
y=400
x+400=1200
x=1200–400
x=800
400+z=832
z=832–400
z=432