2x+6+21=

Solution for 2x+6+21= equation:

Simplifying
2x + 6 + 21 = 0

Reorder the terms:
6 + 21 + 2x = 0

Combine like terms: 6 + 21 = 27
27 + 2x = 0

Solving
27 + 2x = 0

Solving for variable 'x'.

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

Add '-27' to each side of the equation.
27 + -27 + 2x = 0 + -27

Combine like terms: 27 + -27 = 0
0 + 2x = 0 + -27
2x = 0 + -27

Combine like terms: 0 + -27 = -27
2x = -27

Divide each side by '2'.
x = -13.5

Simplifying
x = -13.5