3n+4.5=21

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Solution for 3n+4.5=21 equation: 


Simplifying
3n + 4.5 = 21

Reorder the terms:
4.5 + 3n = 21

Solving
4.5 + 3n = 21

Solving for variable 'n'.

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

Add '-4.5' to each side of the equation.
4.5 + -4.5 + 3n = 21 + -4.5

Combine like terms: 4.5 + -4.5 = 0.0
0.0 + 3n = 21 + -4.5
3n = 21 + -4.5

Combine like terms: 21 + -4.5 = 16.5
3n = 16.5

Divide each side by '3'.
n = 5.5

Simplifying
n = 5.5

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