(3-4x)3=21

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Solution for (3-4x)3=21 equation:


Simplifying
(3 + -4x) * 3 = 21

Reorder the terms for easier multiplication:
3(3 + -4x) = 21
(3 * 3 + -4x * 3) = 21
(9 + -12x) = 21

Solving
9 + -12x = 21

Solving for variable 'x'.

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

Add '-9' to each side of the equation.
9 + -9 + -12x = 21 + -9

Combine like terms: 9 + -9 = 0
0 + -12x = 21 + -9
-12x = 21 + -9

Combine like terms: 21 + -9 = 12
-12x = 12

Divide each side by '-12'.
x = -1

Simplifying
x = -1

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