-6-(3+3a)=a-9

Solution for -6-(3+3a)=a-9 equation:

Simplifying
-6 + -1(3 + 3a) = a + -9
-6 + (3 * -1 + 3a * -1) = a + -9
-6 + (-3 + -3a) = a + -9

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

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

Add '9' to each side of the equation.
-9 + 9 + -3a = -9 + 9 + a

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

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

Solving
-3a = a

Solving for variable 'a'.

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

Add '-1a' to each side of the equation.
-3a + -1a = a + -1a

Combine like terms: -3a + -1a = -4a
-4a = a + -1a

Combine like terms: a + -1a = 0
-4a = 0

Divide each side by '-4'.
a = 0

Simplifying
a = 0