4+n=21

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Solution for 4+n=21 equation: 


Simplifying
4 + n = 21

Solving
4 + n = 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 + n = 21 + -4

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

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

Simplifying
n = 17

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