3. Write two equivalent expressions for the description below. One should have parentheses.

Three groups of 2x + 1

Find the multiplicative inverse of 8-12i

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?

3/4 = c/36 i need with this fraction proble.