3n=-4+21

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Solution for 3n=-4+21 equation: 


Simplifying
3n = -4 + 21

Combine like terms: -4 + 21 = 17
3n = 17

Solving
3n = 17

Solving for variable 'n'.

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

Divide each side by '3'.
n = 5.666666667

Simplifying
n = 5.666666667

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