(4-x)3=42

Solution for (4-x)3=42 equation:

Simplifying
(4 + -1x) * 3 = 42

Reorder the terms for easier multiplication:
3(4 + -1x) = 42
(4 * 3 + -1x * 3) = 42
(12 + -3x) = 42

Solving
12 + -3x = 42

Solving for variable 'x'.

Move all terms containing x to the left, all other terms to the right.

Add '-12' to each side of the equation.
12 + -12 + -3x = 42 + -12

Combine like terms: 12 + -12 = 0
0 + -3x = 42 + -12
-3x = 42 + -12

Combine like terms: 42 + -12 = 30
-3x = 30

Divide each side by '-3'.
x = -10

Simplifying
x = -10