[tex]I~~metoda\\\\1,5~~kg ~~--------------------~~66,75~~z\\0,2~~kg ~~--------------------~~ x\\\\1,5 \cdot x~~[kg} = 0,2\cdot 66,75 ~~[kg\cdot zl]\\\\1,5 \cdot x~~[kg]=13,35 ~~[kg\cdot zl]~~\mid \div 1,5\\\\x = 8,90~~[\frac{kg\cdot zl}{kg} ]\\\\x=8,90~~zl[/tex]
[tex]II~~metoda\\\\1 \frac{1}{2} ~~kg=1,5~~kg~~~~~kosztuje~:~~66,75~~zl\\\\66,75~~zl \div 3 =22,25~~zl~~\Rightarrow ~~tyle~~kosztuje~~pol~~kilograma\\\\22,25~~zl\cdot 2= 44,50~~zl~~\Rightarrow ~~tyle~~kosztuje~~kilogram\\\\44,50~~zl \div 5 = 8,90~~zl~~\Rightarrow~~tyle~~ kosztuje ~~\dfrac{1}{5} kg~~orzechow[/tex]
