X+9=(-21)

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Solution for X+9=(-21) equation: 


Simplifying
X + 9 = (-21)

Reorder the terms:
9 + X = (-21)
9 + X = -21

Solving
9 + X = -21

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 = -21 + -9

Combine like terms: 9 + -9 = 0
0 + X = -21 + -9
X = -21 + -9

Combine like terms: -21 + -9 = -30
X = -30

Simplifying
X = -30

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