4a+[2a+3]=

Solution for 4a+[2a+3]= equation:

Simplifying
4a + [2a + 3] = 0

Reorder the terms:
4a + [3 + 2a] = 0

Remove brackets around [3 + 2a]
4a + 3 + 2a = 0

Reorder the terms:
3 + 4a + 2a = 0

Combine like terms: 4a + 2a = 6a
3 + 6a = 0

Solving
3 + 6a = 0

Solving for variable 'a'.

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

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

Combine like terms: 3 + -3 = 0
0 + 6a = 0 + -3
6a = 0 + -3

Combine like terms: 0 + -3 = -3
6a = -3

Divide each side by '6'.
a = -0.5

Simplifying
a = -0.5