a+b+c=21
b=0.32a
c=1/4b=1/4*0.32a
a+0.32a+1/4*0.32a=21
a+0.32a+0.25*0.32a=21
a+0.4a=21
1.4a=21
a=15
b=4.8
c=1.2
a+b+c=21
b=0.32a
c=1/4b=1/4*0.32a
a+0.32a+1/4*0.32a=21
a+0.32a+0.25*0.32a=21
a+0.4a=21
1.4a=21
a=15
b=4.8
c=1.2