m+n=r

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Solution for m+n=r equation: 


Simplifying
m + n = r

Solving
m + n = r

Solving for variable 'm'.

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

Add '-1n' to each side of the equation.
m + n + -1n = -1n + r

Combine like terms: n + -1n = 0
m + 0 = -1n + r
m = -1n + r

Simplifying
m = -1n + r

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