3x-3(-6x)=-21

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


Simplifying
3x + -3(-6x) = -21

Remove parenthesis around (-6x)
3x + -3 * -6x = -21

Multiply -3 * -6
3x + 18x = -21

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

Solving
21x = -21

Solving for variable 'x'.

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

Divide each side by '21'.
x = -1

Simplifying
x = -1

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