4n-18=21

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Solution for 4n-18=21 equation: 


Simplifying
4n + -18 = 21

Reorder the terms:
-18 + 4n = 21

Solving
-18 + 4n = 21

Solving for variable 'n'.

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

Add '18' to each side of the equation.
-18 + 18 + 4n = 21 + 18

Combine like terms: -18 + 18 = 0
0 + 4n = 21 + 18
4n = 21 + 18

Combine like terms: 21 + 18 = 39
4n = 39

Divide each side by '4'.
n = 9.75

Simplifying
n = 9.75

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