-(a+3)-9=0

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Solution for -(a+3)-9=0 equation:


Simplifying
-1(a + 3) + -9 = 0

Reorder the terms:
-1(3 + a) + -9 = 0
(3 * -1 + a * -1) + -9 = 0
(-3 + -1a) + -9 = 0

Reorder the terms:
-3 + -9 + -1a = 0

Combine like terms: -3 + -9 = -12
-12 + -1a = 0

Solving
-12 + -1a = 0

Solving for variable 'a'.

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

Add '12' to each side of the equation.
-12 + 12 + -1a = 0 + 12

Combine like terms: -12 + 12 = 0
0 + -1a = 0 + 12
-1a = 0 + 12

Combine like terms: 0 + 12 = 12
-1a = 12

Divide each side by '-1'.
a = -12

Simplifying
a = -12

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