(x-9)=12

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Solution for (x-9)=12 equation: 


Simplifying
(x + -9) = 12

Reorder the terms:
(-9 + x) = 12

Remove parenthesis around (-9 + x)
-9 + x = 12

Solving
-9 + x = 12

Solving for variable 'x'.

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

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

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

Combine like terms: 12 + 9 = 21
x = 21

Simplifying
x = 21

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