9(x+7)-21=

Solution for 9(x+7)-21= equation:

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

Reorder the terms:
9(7 + x) + -21 = 0
(7 * 9 + x * 9) + -21 = 0
(63 + 9x) + -21 = 0

Reorder the terms:
63 + -21 + 9x = 0

Combine like terms: 63 + -21 = 42
42 + 9x = 0

Solving
42 + 9x = 0

Solving for variable 'x'.

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

Add '-42' to each side of the equation.
42 + -42 + 9x = 0 + -42

Combine like terms: 42 + -42 = 0
0 + 9x = 0 + -42
9x = 0 + -42

Combine like terms: 0 + -42 = -42
9x = -42

Divide each side by '9'.
x = -4.666666667

Simplifying
x = -4.666666667