[(a+b)-3]2=

Solution for [(a+b)-3]2= equation:

Simplifying
[(a + b) + -3] * 2 = 0

Remove parenthesis around (a + b)
[a + b + -3] * 2 = 0

Reorder the terms:
[-3 + a + b] * 2 = 0

Reorder the terms for easier multiplication:
2[-3 + a + b] = 0
[-3 * 2 + a * 2 + b * 2] = 0
[-6 + 2a + 2b] = 0

Solving
-6 + 2a + 2b = 0

Solving for variable 'a'.

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

Add '6' to each side of the equation.
-6 + 2a + 6 + 2b = 0 + 6

Reorder the terms:
-6 + 6 + 2a + 2b = 0 + 6

Combine like terms: -6 + 6 = 0
0 + 2a + 2b = 0 + 6
2a + 2b = 0 + 6

Combine like terms: 0 + 6 = 6
2a + 2b = 6

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

Combine like terms: 2b + -2b = 0
2a + 0 = 6 + -2b
2a = 6 + -2b

Divide each side by '2'.
a = 3 + -1b

Simplifying
a = 3 + -1b