81=4w+9

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Solution for 81=4w+9 equation:


Simplifying
81 = 4w + 9

Reorder the terms:
81 = 9 + 4w

Solving
81 = 9 + 4w

Solving for variable 'w'.

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

Add '-4w' to each side of the equation.
81 + -4w = 9 + 4w + -4w

Combine like terms: 4w + -4w = 0
81 + -4w = 9 + 0
81 + -4w = 9

Add '-81' to each side of the equation.
81 + -81 + -4w = 9 + -81

Combine like terms: 81 + -81 = 0
0 + -4w = 9 + -81
-4w = 9 + -81

Combine like terms: 9 + -81 = -72
-4w = -72

Divide each side by '-4'.
w = 18

Simplifying
w = 18

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