7(x+6)-21=

Solution for 7(x+6)-21= equation:

Simplifying
7(x + 6) + -21 = 0

Reorder the terms:
7(6 + x) + -21 = 0
(6 * 7 + x * 7) + -21 = 0
(42 + 7x) + -21 = 0

Reorder the terms:
42 + -21 + 7x = 0

Combine like terms: 42 + -21 = 21
21 + 7x = 0

Solving
21 + 7x = 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 + 7x = 0 + -21

Combine like terms: 21 + -21 = 0
0 + 7x = 0 + -21
7x = 0 + -21

Combine like terms: 0 + -21 = -21
7x = -21

Divide each side by '7'.
x = -3

Simplifying
x = -3