M+M+N=20

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Solution for M+M+N=20 equation: 


Simplifying
M + M + N = 20

Combine like terms: M + M = 2M
2M + N = 20

Solving
2M + N = 20

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.
2M + N + -1N = 20 + -1N

Combine like terms: N + -1N = 0
2M + 0 = 20 + -1N
2M = 20 + -1N

Divide each side by '2'.
M = 10 + -0.5N

Simplifying
M = 10 + -0.5N

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