n+n+m=20

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Solution for n+n+m=20 equation: 


Simplifying
n + n + m = 20

Reorder the terms:
m + n + n = 20

Combine like terms: n + n = 2n
m + 2n = 20

Solving
m + 2n = 20

Solving for variable 'm'.

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

Add '-2n' to each side of the equation.
m + 2n + -2n = 20 + -2n

Combine like terms: 2n + -2n = 0
m + 0 = 20 + -2n
m = 20 + -2n

Simplifying
m = 20 + -2n

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