6+a=6+a+6+a

Solution for 6+a=6+a+6+a equation:

Simplifying
6 + a = 6 + a + 6 + a

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

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

Combine like terms: a + a = 2a
6 + a = 12 + 2a

Solving
6 + a = 12 + 2a

Solving for variable 'a'.

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

Add '-2a' to each side of the equation.
6 + a + -2a = 12 + 2a + -2a

Combine like terms: a + -2a = -1a
6 + -1a = 12 + 2a + -2a

Combine like terms: 2a + -2a = 0
6 + -1a = 12 + 0
6 + -1a = 12

Add '-6' to each side of the equation.
6 + -6 + -1a = 12 + -6

Combine like terms: 6 + -6 = 0
0 + -1a = 12 + -6
-1a = 12 + -6

Combine like terms: 12 + -6 = 6
-1a = 6

Divide each side by '-1'.
a = -6

Simplifying
a = -6