-8n+21=7n-3(8n-7)

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Solution for -8n+21=7n-3(8n-7) equation:


Simplifying
-8n + 21 = 7n + -3(8n + -7)

Reorder the terms:
21 + -8n = 7n + -3(8n + -7)

Reorder the terms:
21 + -8n = 7n + -3(-7 + 8n)
21 + -8n = 7n + (-7 * -3 + 8n * -3)
21 + -8n = 7n + (21 + -24n)

Reorder the terms:
21 + -8n = 21 + 7n + -24n

Combine like terms: 7n + -24n = -17n
21 + -8n = 21 + -17n

Add '-21' to each side of the equation.
21 + -21 + -8n = 21 + -21 + -17n

Combine like terms: 21 + -21 = 0
0 + -8n = 21 + -21 + -17n
-8n = 21 + -21 + -17n

Combine like terms: 21 + -21 = 0
-8n = 0 + -17n
-8n = -17n

Solving
-8n = -17n

Solving for variable 'n'.

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

Add '17n' to each side of the equation.
-8n + 17n = -17n + 17n

Combine like terms: -8n + 17n = 9n
9n = -17n + 17n

Combine like terms: -17n + 17n = 0
9n = 0

Divide each side by '9'.
n = 0

Simplifying
n = 0

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