x-ilość miodu w 1 beczce
y-ilośc miodu w 2 beczce
[tex]\left \{ {{x+y=100} \atop {x-12.5=y+20}} \right. \\\left \{ {{x+y=100} \atop {x=32.5+y}} \right. \\\left \{ {{x+y=100} \atop {x-y=32.5}} \right. \\2x=132.5/:2\\x=66.25\\x+y=100\\66.25+y=100\\y=33.75[/tex]
