5n-4-n=9n+21

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Solution for 5n-4-n=9n+21 equation:


Simplifying
5n + -4 + -1n = 9n + 21

Reorder the terms:
-4 + 5n + -1n = 9n + 21

Combine like terms: 5n + -1n = 4n
-4 + 4n = 9n + 21

Reorder the terms:
-4 + 4n = 21 + 9n

Solving
-4 + 4n = 21 + 9n

Solving for variable 'n'.

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

Add '-9n' to each side of the equation.
-4 + 4n + -9n = 21 + 9n + -9n

Combine like terms: 4n + -9n = -5n
-4 + -5n = 21 + 9n + -9n

Combine like terms: 9n + -9n = 0
-4 + -5n = 21 + 0
-4 + -5n = 21

Add '4' to each side of the equation.
-4 + 4 + -5n = 21 + 4

Combine like terms: -4 + 4 = 0
0 + -5n = 21 + 4
-5n = 21 + 4

Combine like terms: 21 + 4 = 25
-5n = 25

Divide each side by '-5'.
n = -5

Simplifying
n = -5

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