21=3(h-1)

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Solution for 21=3(h-1) equation:


Simplifying
21 = 3(h + -1)

Reorder the terms:
21 = 3(-1 + h)
21 = (-1 * 3 + h * 3)
21 = (-3 + 3h)

Solving
21 = -3 + 3h

Solving for variable 'h'.

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

Add '-3h' to each side of the equation.
21 + -3h = -3 + 3h + -3h

Combine like terms: 3h + -3h = 0
21 + -3h = -3 + 0
21 + -3h = -3

Add '-21' to each side of the equation.
21 + -21 + -3h = -3 + -21

Combine like terms: 21 + -21 = 0
0 + -3h = -3 + -21
-3h = -3 + -21

Combine like terms: -3 + -21 = -24
-3h = -24

Divide each side by '-3'.
h = 8

Simplifying
h = 8

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