x+13=13-21

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Solution for x+13=13-21 equation: 


Simplifying
x + 13 = 13 + -21

Reorder the terms:
13 + x = 13 + -21

Combine like terms: 13 + -21 = -8
13 + x = -8

Solving
13 + x = -8

Solving for variable 'x'.

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

Add '-13' to each side of the equation.
13 + -13 + x = -8 + -13

Combine like terms: 13 + -13 = 0
0 + x = -8 + -13
x = -8 + -13

Combine like terms: -8 + -13 = -21
x = -21

Simplifying
x = -21

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