x+21=-8

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Solution for x+21=-8 equation: 


Simplifying
x + 21 = -8

Reorder the terms:
21 + x = -8

Solving
21 + x = -8

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 = -8 + -21

Combine like terms: 21 + -21 = 0
0 + x = -8 + -21
x = -8 + -21

Combine like terms: -8 + -21 = -29
x = -29

Simplifying
x = -29

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