6a-(5+5a)=(3+9)-8

Solution for 6a-(5+5a)=(3+9)-8 equation:

Simplifying
6a + -1(5 + 5a) = (3 + 9) + -8
6a + (5 * -1 + 5a * -1) = (3 + 9) + -8
6a + (-5 + -5a) = (3 + 9) + -8

Reorder the terms:
-5 + 6a + -5a = (3 + 9) + -8

Combine like terms: 6a + -5a = 1a
-5 + 1a = (3 + 9) + -8

Combine like terms: 3 + 9 = 12
-5 + 1a = (12) + -8
-5 + 1a = 12 + -8

Combine like terms: 12 + -8 = 4
-5 + 1a = 4

Solving
-5 + 1a = 4

Solving for variable 'a'.

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

Add '5' to each side of the equation.
-5 + 5 + 1a = 4 + 5

Combine like terms: -5 + 5 = 0
0 + 1a = 4 + 5
1a = 4 + 5

Combine like terms: 4 + 5 = 9
1a = 9

Divide each side by '1'.
a = 9

Simplifying
a = 9