m+a=r

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Solution for m+a=r equation: 


Simplifying
m + a = r

Reorder the terms:
a + m = r

Solving
a + m = r

Solving for variable 'a'.

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

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

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

Simplifying
a = -1m + r

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