Answer:
x = 4
Explanation:
To undo a cube, take the cube root.
x³ = 64
∛(x³) = ∛64
x = 4
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Additional comment
An exponent signifies the number of times the base appears in the product.
x³ = x·x·x . . . . . x is a factor 3 times in the product.
It can be helpful to memorize the cubes of small integers:
1³ = 1; 2³ = 8; 3³ = 27; 4³ = 64; 5³ = 125; 6³ = 216; 7³ = 343; 8³ = 512;
9³ = 729; 10³ = 1000