a-42=-54

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Solution for a-42=-54 equation: 


Simplifying
a + -42 = -54

Reorder the terms:
-42 + a = -54

Solving
-42 + a = -54

Solving for variable 'a'.

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

Add '42' to each side of the equation.
-42 + 42 + a = -54 + 42

Combine like terms: -42 + 42 = 0
0 + a = -54 + 42
a = -54 + 42

Combine like terms: -54 + 42 = -12
a = -12

Simplifying
a = -12

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