5n-3n-4=21

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Solution for 5n-3n-4=21 equation:


Simplifying
5n + -3n + -4 = 21

Reorder the terms:
-4 + 5n + -3n = 21

Combine like terms: 5n + -3n = 2n
-4 + 2n = 21

Solving
-4 + 2n = 21

Solving for variable 'n'.

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

Add '4' to each side of the equation.
-4 + 4 + 2n = 21 + 4

Combine like terms: -4 + 4 = 0
0 + 2n = 21 + 4
2n = 21 + 4

Combine like terms: 21 + 4 = 25
2n = 25

Divide each side by '2'.
n = 12.5

Simplifying
n = 12.5

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