Solve for b
b = \frac{81}{8} = 10\frac{1}{8} = 10.125
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9\times 9=8b
Variable b cannot be equal to 0 since division by zero is not defined. Multiply both sides of the equation by 9b, the least common multiple of b,9.
81=8b
Multiply 9 and 9 to get 81.
8b=81
Swap sides so that all variable terms are on the left hand side.
b=\frac{81}{8}
Divide both sides by 8.
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