9-x=x+12

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Solution for 9-x=x+12 equation:


Simplifying
9 + -1x = x + 12

Reorder the terms:
9 + -1x = 12 + x

Solving
9 + -1x = 12 + x

Solving for variable 'x'.

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

Add '-1x' to each side of the equation.
9 + -1x + -1x = 12 + x + -1x

Combine like terms: -1x + -1x = -2x
9 + -2x = 12 + x + -1x

Combine like terms: x + -1x = 0
9 + -2x = 12 + 0
9 + -2x = 12

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

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

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

Divide each side by '-2'.
x = -1.5

Simplifying
x = -1.5

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