6(a+3)-15=

Solution for 6(a+3)-15= equation:

Simplifying
6(a + 3) + -15 = 0

Reorder the terms:
6(3 + a) + -15 = 0
(3 * 6 + a * 6) + -15 = 0
(18 + 6a) + -15 = 0

Reorder the terms:
18 + -15 + 6a = 0

Combine like terms: 18 + -15 = 3
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