1) a+b+c=228948
a+b=40011
b+c=209937
c=228948-40011
c=188937
b=209937-188937
b=21000
a=40011-21000
a=19011
2) a+b+c=978870
a+b=458420
b+c=630681
c=978870-458420
c=520450
b=630681-520450
b=110231
a=458420-110231
a=348189
3) a+b+c=100
a+b=80
b+c=70
c=100-80
c=20
b=70-20
b=50
a=80-50
a=30