b-9=81

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Solution for b-9=81 equation: 


Simplifying
b + -9 = 81

Reorder the terms:
-9 + b = 81

Solving
-9 + b = 81

Solving for variable 'b'.

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

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

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

Combine like terms: 81 + 9 = 90
b = 90

Simplifying
b = 90

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