-20=-9-(-m)

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Solution for -20=-9-(-m) equation:


Simplifying
-20 = -9 + -1(-1m)

Remove parenthesis around (-1m)
-20 = -9 + -1 * -1m

Multiply -1 * -1
-20 = -9 + 1m

Solving
-20 = -9 + 1m

Solving for variable 'm'.

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

Add '-1m' to each side of the equation.
-20 + -1m = -9 + 1m + -1m

Combine like terms: 1m + -1m = 0
-20 + -1m = -9 + 0
-20 + -1m = -9

Add '20' to each side of the equation.
-20 + 20 + -1m = -9 + 20

Combine like terms: -20 + 20 = 0
0 + -1m = -9 + 20
-1m = -9 + 20

Combine like terms: -9 + 20 = 11
-1m = 11

Divide each side by '-1'.
m = -11

Simplifying
m = -11

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