3(x+1)+3(x+3)=

Solution for 3(x+1)+3(x+3)= equation:

Simplifying
3(x + 1) + 3(x + 3) = 0

Reorder the terms:
3(1 + x) + 3(x + 3) = 0
(1 * 3 + x * 3) + 3(x + 3) = 0
(3 + 3x) + 3(x + 3) = 0

Reorder the terms:
3 + 3x + 3(3 + x) = 0
3 + 3x + (3 * 3 + x * 3) = 0
3 + 3x + (9 + 3x) = 0

Reorder the terms:
3 + 9 + 3x + 3x = 0

Combine like terms: 3 + 9 = 12
12 + 3x + 3x = 0

Combine like terms: 3x + 3x = 6x
12 + 6x = 0

Solving
12 + 6x = 0

Solving for variable 'x'.

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

Add '-12' to each side of the equation.
12 + -12 + 6x = 0 + -12

Combine like terms: 12 + -12 = 0
0 + 6x = 0 + -12
6x = 0 + -12

Combine like terms: 0 + -12 = -12
6x = -12

Divide each side by '6'.
x = -2

Simplifying
x = -2