2[a-2(a-b)]=

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

Simplifying
2[a + -2(a + -1b)] = 0
2[a + (a * -2 + -1b * -2)] = 0
2[a + (-2a + 2b)] = 0

Combine like terms: a + -2a = -1a
2[-1a + 2b] = 0
[-1a * 2 + 2b * 2] = 0
[-2a + 4b] = 0

Solving
-2a + 4b = 0

Solving for variable 'a'.

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

Add '-4b' to each side of the equation.
-2a + 4b + -4b = 0 + -4b

Combine like terms: 4b + -4b = 0
-2a + 0 = 0 + -4b
-2a = 0 + -4b
Remove the zero:
-2a = -4b

Divide each side by '-2'.
a = 2b

Simplifying
a = 2b