12+x=9

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Solution for 12+x=9 equation: 


Simplifying
12 + x = 9

Solving
12 + x = 9

Solving for variable 'x'.

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

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

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

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

Simplifying
x = -3

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