3a-[4a-3(a-2b)-a]=

Solution for 3a-[4a-3(a-2b)-a]= equation:

Simplifying
3a + -1[4a + -3(a + -2b) + -1a] = 0
3a + -1[4a + (a * -3 + -2b * -3) + -1a] = 0
3a + -1[4a + (-3a + 6b) + -1a] = 0

Reorder the terms:
3a + -1[4a + -3a + -1a + 6b] = 0

Combine like terms: 4a + -3a = 1a
3a + -1[1a + -1a + 6b] = 0

Combine like terms: 1a + -1a = 0
3a + -1[0 + 6b] = 0
3a + -1[6b] = 0

Remove brackets around [6b]
3a + -1 * 6b = 0

Multiply -1 * 6
3a + -6b = 0

Solving
3a + -6b = 0

Solving for variable 'a'.

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

Add '6b' to each side of the equation.
3a + -6b + 6b = 0 + 6b

Combine like terms: -6b + 6b = 0
3a + 0 = 0 + 6b
3a = 0 + 6b
Remove the zero:
3a = 6b

Divide each side by '3'.
a = 2b

Simplifying
a = 2b