21-n=31

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Solution for 21-n=31 equation: 


Simplifying
21 + -1n = 31

Solving
21 + -1n = 31

Solving for variable 'n'.

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

Add '-21' to each side of the equation.
21 + -21 + -1n = 31 + -21

Combine like terms: 21 + -21 = 0
0 + -1n = 31 + -21
-1n = 31 + -21

Combine like terms: 31 + -21 = 10
-1n = 10

Divide each side by '-1'.
n = -10

Simplifying
n = -10

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