15+6(x+1)=0

Solution for 15+6(x+1)=0 equation:

Simplifying
15 + 6(x + 1) = 0

Reorder the terms:
15 + 6(1 + x) = 0
15 + (1 * 6 + x * 6) = 0
15 + (6 + 6x) = 0

Combine like terms: 15 + 6 = 21
21 + 6x = 0

Solving
21 + 6x = 0

Solving for variable 'x'.

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

Add '-21' to each side of the equation.
21 + -21 + 6x = 0 + -21

Combine like terms: 21 + -21 = 0
0 + 6x = 0 + -21
6x = 0 + -21

Combine like terms: 0 + -21 = -21
6x = -21

Divide each side by '6'.
x = -3.5

Simplifying
x = -3.5