Răspuns :
I=II+50/III+75.....III=II-25.....
II+II+50+II-25=475......
6(II)+25=425.
6(II)=475-25=450
II=450:6
II=75
I=75+50=125
III=75-25=50
a+b+c=475
a=b+50 b=a-50
a=75+c c=a-75
a+a-50+a-75=475
3a=475+50+75
3a=600
a=200
b=200-50
b=150
c=200-75
c=125
a=b+50 b=a-50
a=75+c c=a-75
a+a-50+a-75=475
3a=475+50+75
3a=600
a=200
b=200-50
b=150
c=200-75
c=125