13=m+(-8)

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Solution for 13=m+(-8) equation: 


Simplifying
13 = m + (-8)
13 = m + -8

Reorder the terms:
13 = -8 + m

Solving
13 = -8 + m

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.
13 + -1m = -8 + m + -1m

Combine like terms: m + -1m = 0
13 + -1m = -8 + 0
13 + -1m = -8

Add '-13' to each side of the equation.
13 + -13 + -1m = -8 + -13

Combine like terms: 13 + -13 = 0
0 + -1m = -8 + -13
-1m = -8 + -13

Combine like terms: -8 + -13 = -21
-1m = -21

Divide each side by '-1'.
m = 21

Simplifying
m = 21

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