X+9+12=3

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Solution for X+9+12=3 equation: 


Simplifying
X + 9 + 12 = 3

Reorder the terms:
9 + 12 + X = 3

Combine like terms: 9 + 12 = 21
21 + X = 3

Solving
21 + X = 3

Solving for variable 'X'.

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

Add '-21' to each side of the equation.
21 + -21 + X = 3 + -21

Combine like terms: 21 + -21 = 0
0 + X = 3 + -21
X = 3 + -21

Combine like terms: 3 + -21 = -18
X = -18

Simplifying
X = -18

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