21=42+7h

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Solution for 21=42+7h equation:


Simplifying
21 = 42 + 7h

Solving
21 = 42 + 7h

Solving for variable 'h'.

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

Add '-7h' to each side of the equation.
21 + -7h = 42 + 7h + -7h

Combine like terms: 7h + -7h = 0
21 + -7h = 42 + 0
21 + -7h = 42

Add '-21' to each side of the equation.
21 + -21 + -7h = 42 + -21

Combine like terms: 21 + -21 = 0
0 + -7h = 42 + -21
-7h = 42 + -21

Combine like terms: 42 + -21 = 21
-7h = 21

Divide each side by '-7'.
h = -3

Simplifying
h = -3

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