-21+-6-a=0

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Solution for -21+-6-a=0 equation:


Simplifying
-21 + -6 + -1a = 0

Combine like terms: -21 + -6 = -27
-27 + -1a = 0

Solving
-27 + -1a = 0

Solving for variable 'a'.

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

Add '27' to each side of the equation.
-27 + 27 + -1a = 0 + 27

Combine like terms: -27 + 27 = 0
0 + -1a = 0 + 27
-1a = 0 + 27

Combine like terms: 0 + 27 = 27
-1a = 27

Divide each side by '-1'.
a = -27

Simplifying
a = -27

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