21=-8(4n+9)

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Solution for 21=-8(4n+9) equation:


Simplifying
21 = -8(4n + 9)

Reorder the terms:
21 = -8(9 + 4n)
21 = (9 * -8 + 4n * -8)
21 = (-72 + -32n)

Solving
21 = -72 + -32n

Solving for variable 'n'.

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

Add '32n' to each side of the equation.
21 + 32n = -72 + -32n + 32n

Combine like terms: -32n + 32n = 0
21 + 32n = -72 + 0
21 + 32n = -72

Add '-21' to each side of the equation.
21 + -21 + 32n = -72 + -21

Combine like terms: 21 + -21 = 0
0 + 32n = -72 + -21
32n = -72 + -21

Combine like terms: -72 + -21 = -93
32n = -93

Divide each side by '32'.
n = -2.90625

Simplifying
n = -2.90625

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