(m-4)+m=20

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Solution for (m-4)+m=20 equation:


Simplifying
(m + -4) + m = 20

Reorder the terms:
(-4 + m) + m = 20

Remove parenthesis around (-4 + m)
-4 + m + m = 20

Combine like terms: m + m = 2m
-4 + 2m = 20

Solving
-4 + 2m = 20

Solving for variable 'm'.

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

Add '4' to each side of the equation.
-4 + 4 + 2m = 20 + 4

Combine like terms: -4 + 4 = 0
0 + 2m = 20 + 4
2m = 20 + 4

Combine like terms: 20 + 4 = 24
2m = 24

Divide each side by '2'.
m = 12

Simplifying
m = 12

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