a+21=-56

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Solution for a+21=-56 equation: 


Simplifying
a + 21 = -56

Reorder the terms:
21 + a = -56

Solving
21 + a = -56

Solving for variable 'a'.

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

Add '-21' to each side of the equation.
21 + -21 + a = -56 + -21

Combine like terms: 21 + -21 = 0
0 + a = -56 + -21
a = -56 + -21

Combine like terms: -56 + -21 = -77
a = -77

Simplifying
a = -77

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