Question 908515
a+b=32,
100*a+20*b=40*32
a=32-b
100*(32-b)+20*b=1280
3200-100b+20*b=1280
-80*b=-1920
b=24
a=32-b
a=8  liter at 100%
b=24  liter at 20%
check
100*8+20*24=40*32
800+480=1280
1280=1280
ok