81=-9b

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Solution for 81=-9b equation:


Simplifying
81 = -9b

Solving
81 = -9b

Solving for variable 'b'.

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

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

Combine like terms: -9b + 9b = 0
81 + 9b = 0

Add '-81' to each side of the equation.
81 + -81 + 9b = 0 + -81

Combine like terms: 81 + -81 = 0
0 + 9b = 0 + -81
9b = 0 + -81

Combine like terms: 0 + -81 = -81
9b = -81

Divide each side by '9'.
b = -9

Simplifying
b = -9

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