3x-3(4-6x)+9=21

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Solution for 3x-3(4-6x)+9=21 equation:


Simplifying
3x + -3(4 + -6x) + 9 = 21
3x + (4 * -3 + -6x * -3) + 9 = 21
3x + (-12 + 18x) + 9 = 21

Reorder the terms:
-12 + 9 + 3x + 18x = 21

Combine like terms: -12 + 9 = -3
-3 + 3x + 18x = 21

Combine like terms: 3x + 18x = 21x
-3 + 21x = 21

Solving
-3 + 21x = 21

Solving for variable 'x'.

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

Add '3' to each side of the equation.
-3 + 3 + 21x = 21 + 3

Combine like terms: -3 + 3 = 0
0 + 21x = 21 + 3
21x = 21 + 3

Combine like terms: 21 + 3 = 24
21x = 24

Divide each side by '21'.
x = 1.142857143

Simplifying
x = 1.142857143

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