3x=-x+12

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Solution for 3x=-x+12 equation: 


Simplifying
3x = -1x + 12

Reorder the terms:
3x = 12 + -1x

Solving
3x = 12 + -1x

Solving for variable 'x'.

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

Add 'x' to each side of the equation.
3x + x = 12 + -1x + x

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

Combine like terms: -1x + x = 0
4x = 12 + 0
4x = 12

Divide each side by '4'.
x = 3

Simplifying
x = 3

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