3-9(1-4x)=-21

Solution for 3-9(1-4x)=-21 equation:

Simplifying
3 + -9(1 + -4x) = -21
3 + (1 * -9 + -4x * -9) = -21
3 + (-9 + 36x) = -21

Combine like terms: 3 + -9 = -6
-6 + 36x = -21

Solving
-6 + 36x = -21

Solving for variable 'x'.

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

Add '6' to each side of the equation.
-6 + 6 + 36x = -21 + 6

Combine like terms: -6 + 6 = 0
0 + 36x = -21 + 6
36x = -21 + 6

Combine like terms: -21 + 6 = -15
36x = -15

Divide each side by '36'.
x = -0.4166666667

Simplifying
x = -0.4166666667