6+(a+6)+7=

Solution for 6+(a+6)+7= equation:

Simplifying
6 + (a + 6) + 7 = 0

Reorder the terms:
6 + (6 + a) + 7 = 0

Remove parenthesis around (6 + a)
6 + 6 + a + 7 = 0

Reorder the terms:
6 + 6 + 7 + a = 0

Combine like terms: 6 + 6 = 12
12 + 7 + a = 0

Combine like terms: 12 + 7 = 19
19 + a = 0

Solving
19 + a = 0

Solving for variable 'a'.

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

Add '-19' to each side of the equation.
19 + -19 + a = 0 + -19

Combine like terms: 19 + -19 = 0
0 + a = 0 + -19
a = 0 + -19

Combine like terms: 0 + -19 = -19
a = -19

Simplifying
a = -19