1)
a+b =240.5
a =b+20
b+20 + b =240.5
2b =240.5-20 =220.5
b =110.25
a =b+20
a =110.25+20 =130.25
v ; 130.25+110.25 =240.5
2)
a+b+c =1236.24
b =a+20 ; a =b-20
c =b +50.6
b-20 + b + b+50.6 =1236.24
3b =1236.24+20 -50.6
3b=1205.64
b =401.88
a =401.88-20 =381.88
c =401.88+50.6 =452.48
v ; 381.88+401.88+452.48 =1236.24