12=h-21

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Solution for 12=h-21 equation:


Simplifying
12 = h + -21

Reorder the terms:
12 = -21 + h

Solving
12 = -21 + h

Solving for variable 'h'.

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

Add '-1h' to each side of the equation.
12 + -1h = -21 + h + -1h

Combine like terms: h + -1h = 0
12 + -1h = -21 + 0
12 + -1h = -21

Add '-12' to each side of the equation.
12 + -12 + -1h = -21 + -12

Combine like terms: 12 + -12 = 0
0 + -1h = -21 + -12
-1h = -21 + -12

Combine like terms: -21 + -12 = -33
-1h = -33

Divide each side by '-1'.
h = 33

Simplifying
h = 33

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