h-(-21)=20

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Solution for h-(-21)=20 equation: 


Simplifying
h + -1(-21) = 20

Multiply -1 * -21
h + 21 = 20

Reorder the terms:
21 + h = 20

Solving
21 + h = 20

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 = 20 + -21

Combine like terms: 21 + -21 = 0
0 + h = 20 + -21
h = 20 + -21

Combine like terms: 20 + -21 = -1
h = -1

Simplifying
h = -1

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