12+x=-2x+9

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Solution for 12+x=-2x+9 equation: 


Simplifying
12 + x = -2x + 9

Reorder the terms:
12 + x = 9 + -2x

Solving
12 + x = 9 + -2x

Solving for variable 'x'.

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

Add '2x' to each side of the equation.
12 + x + 2x = 9 + -2x + 2x

Combine like terms: x + 2x = 3x
12 + 3x = 9 + -2x + 2x

Combine like terms: -2x + 2x = 0
12 + 3x = 9 + 0
12 + 3x = 9

Add '-12' to each side of the equation.
12 + -12 + 3x = 9 + -12

Combine like terms: 12 + -12 = 0
0 + 3x = 9 + -12
3x = 9 + -12

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

Divide each side by '3'.
x = -1

Simplifying
x = -1

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