4a+5(a+3)=

Solution for 4a+5(a+3)= equation:

Simplifying
4a + 5(a + 3) = 0

Reorder the terms:
4a + 5(3 + a) = 0
4a + (3 * 5 + a * 5) = 0
4a + (15 + 5a) = 0

Reorder the terms:
15 + 4a + 5a = 0

Combine like terms: 4a + 5a = 9a
15 + 9a = 0

Solving
15 + 9a = 0

Solving for variable 'a'.

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

Add '-15' to each side of the equation.
15 + -15 + 9a = 0 + -15

Combine like terms: 15 + -15 = 0
0 + 9a = 0 + -15
9a = 0 + -15

Combine like terms: 0 + -15 = -15
9a = -15

Divide each side by '9'.
a = -1.666666667

Simplifying
a = -1.666666667