-6a-3a=-81

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Solution for -6a-3a=-81 equation: 


Simplifying
-6a + -3a = -81

Combine like terms: -6a + -3a = -9a
-9a = -81

Solving
-9a = -81

Solving for variable 'a'.

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

Divide each side by '-9'.
a = 9

Simplifying
a = 9

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