4a+(a+3)=

Solution for 4a+(a+3)= equation:

Simplifying
4a + (a + 3) = 0

Reorder the terms:
4a + (3 + a) = 0

Remove parenthesis around (3 + a)
4a + 3 + a = 0

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

Combine like terms: 4a + a = 5a
3 + 5a = 0

Solving
3 + 5a = 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 + 5a = 0 + -3

Combine like terms: 3 + -3 = 0
0 + 5a = 0 + -3
5a = 0 + -3

Combine like terms: 0 + -3 = -3
5a = -3

Divide each side by '5'.
a = -0.6

Simplifying
a = -0.6