(m-7)-(2m)=12

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Solution for (m-7)-(2m)=12 equation:


Simplifying
(m + -7) + -1(2m) = 12

Reorder the terms:
(-7 + m) + -1(2m) = 12

Remove parenthesis around (-7 + m)
-7 + m + -1(2m) = 12

Remove parenthesis around (2m)
-7 + m + -1 * 2m = 12

Multiply -1 * 2
-7 + m + -2m = 12

Combine like terms: m + -2m = -1m
-7 + -1m = 12

Solving
-7 + -1m = 12

Solving for variable 'm'.

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

Add '7' to each side of the equation.
-7 + 7 + -1m = 12 + 7

Combine like terms: -7 + 7 = 0
0 + -1m = 12 + 7
-1m = 12 + 7

Combine like terms: 12 + 7 = 19
-1m = 19

Divide each side by '-1'.
m = -19

Simplifying
m = -19

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