81=3(w+7)

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Solution for 81=3(w+7) equation:


Simplifying
81 = 3(w + 7)

Reorder the terms:
81 = 3(7 + w)
81 = (7 * 3 + w * 3)
81 = (21 + 3w)

Solving
81 = 21 + 3w

Solving for variable 'w'.

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

Add '-3w' to each side of the equation.
81 + -3w = 21 + 3w + -3w

Combine like terms: 3w + -3w = 0
81 + -3w = 21 + 0
81 + -3w = 21

Add '-81' to each side of the equation.
81 + -81 + -3w = 21 + -81

Combine like terms: 81 + -81 = 0
0 + -3w = 21 + -81
-3w = 21 + -81

Combine like terms: 21 + -81 = -60
-3w = -60

Divide each side by '-3'.
w = 20

Simplifying
w = 20

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