-3x-8? I would like to know the steps also

An equation where variables are used to represent known values—function notation true or false

What is the value of x in the following equation. -x ^3/2 = -27

Answer asap. you begin with 1/2 scoop of ice cream. since you're hungry, you ask the vendor for 2/7 more scoops of ice cream. then, you eat 5/8 scoops. how many scoops of ice cream are left on your cone? i will mark brainliest for first correct answer.