9n+21=8n+7

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Solution for 9n+21=8n+7 equation:


Simplifying
9n + 21 = 8n + 7

Reorder the terms:
21 + 9n = 8n + 7

Reorder the terms:
21 + 9n = 7 + 8n

Solving
21 + 9n = 7 + 8n

Solving for variable 'n'.

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

Add '-8n' to each side of the equation.
21 + 9n + -8n = 7 + 8n + -8n

Combine like terms: 9n + -8n = 1n
21 + 1n = 7 + 8n + -8n

Combine like terms: 8n + -8n = 0
21 + 1n = 7 + 0
21 + 1n = 7

Add '-21' to each side of the equation.
21 + -21 + 1n = 7 + -21

Combine like terms: 21 + -21 = 0
0 + 1n = 7 + -21
1n = 7 + -21

Combine like terms: 7 + -21 = -14
1n = -14

Divide each side by '1'.
n = -14

Simplifying
n = -14

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