x+x+x=180
x=60
y+y+x=200
200-60=140:2=70
y=70
y+x-z=50
70+60-z=50
z=-70
2z-y+2x=-140-70+120=-90
Смотри
x+x+x=180
x=60
y+y+x=200
200-60=140:2=70
y=70
y+x-z=50
70+60-z=50
z=-70
2z-y+2x=-140-70+120=-90
Смотри