6x-(-x)-3x=3x+12

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Solution for 6x-(-x)-3x=3x+12 equation:


Simplifying
6x + -1(-1x) + -3x = 3x + 12

Remove parenthesis around (-1x)
6x + -1 * -1x + -3x = 3x + 12

Multiply -1 * -1
6x + 1x + -3x = 3x + 12

Combine like terms: 6x + 1x = 7x
7x + -3x = 3x + 12

Combine like terms: 7x + -3x = 4x
4x = 3x + 12

Reorder the terms:
4x = 12 + 3x

Solving
4x = 12 + 3x

Solving for variable 'x'.

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

Add '-3x' to each side of the equation.
4x + -3x = 12 + 3x + -3x

Combine like terms: 4x + -3x = 1x
1x = 12 + 3x + -3x

Combine like terms: 3x + -3x = 0
1x = 12 + 0
1x = 12

Divide each side by '1'.
x = 12

Simplifying
x = 12

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