n-20+31=21

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Solution for n-20+31=21 equation: 


Simplifying
n + -20 + 31 = 21

Reorder the terms:
-20 + 31 + n = 21

Combine like terms: -20 + 31 = 11
11 + n = 21

Solving
11 + n = 21

Solving for variable 'n'.

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

Add '-11' to each side of the equation.
11 + -11 + n = 21 + -11

Combine like terms: 11 + -11 = 0
0 + n = 21 + -11
n = 21 + -11

Combine like terms: 21 + -11 = 10
n = 10

Simplifying
n = 10

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