9n-3-5n=21

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Solution for 9n-3-5n=21 equation: 


Simplifying
9n + -3 + -5n = 21

Reorder the terms:
-3 + 9n + -5n = 21

Combine like terms: 9n + -5n = 4n
-3 + 4n = 21

Solving
-3 + 4n = 21

Solving for variable 'n'.

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

Add '3' to each side of the equation.
-3 + 3 + 4n = 21 + 3

Combine like terms: -3 + 3 = 0
0 + 4n = 21 + 3
4n = 21 + 3

Combine like terms: 21 + 3 = 24
4n = 24

Divide each side by '4'.
n = 6

Simplifying
n = 6

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