8(x+9)-21=0

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Solution for 8(x+9)-21=0 equation:


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

Reorder the terms:
8(9 + x) + -21 = 0
(9 * 8 + x * 8) + -21 = 0
(72 + 8x) + -21 = 0

Reorder the terms:
72 + -21 + 8x = 0

Combine like terms: 72 + -21 = 51
51 + 8x = 0

Solving
51 + 8x = 0

Solving for variable 'x'.

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

Add '-51' to each side of the equation.
51 + -51 + 8x = 0 + -51

Combine like terms: 51 + -51 = 0
0 + 8x = 0 + -51
8x = 0 + -51

Combine like terms: 0 + -51 = -51
8x = -51

Divide each side by '8'.
x = -6.375

Simplifying
x = -6.375

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