-9+(-12+h)=

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Solution for -9+(-12+h)= equation: 


Simplifying
-9 + (-12 + h) = 0

Remove parenthesis around (-12 + h)
-9 + -12 + h = 0

Combine like terms: -9 + -12 = -21
-21 + h = 0

Solving
-21 + h = 0

Solving for variable 'h'.

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

Add '21' to each side of the equation.
-21 + 21 + h = 0 + 21

Combine like terms: -21 + 21 = 0
0 + h = 0 + 21
h = 0 + 21

Combine like terms: 0 + 21 = 21
h = 21

Simplifying
h = 21

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