How do i solve for this?

Write two subtraction equations that are equivalent to 5 + 12 = 17.

The distributive property allows you to say that 3(x − 1) = 3x −

Answer asap and if you do you will get brainliest. catherine buys a gallon of ice cream from the store. after taking it home, she eats a fifth of a gallon of ice cream. her sister eats some of the ice cream as well. if two-thirds of the original amount of ice cream is left, then what fraction of a gallon of ice cream did her sister eat?