9b-21=

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Solution for 9b-21= equation:


9b-21=0

We simplify the equation to the form, which is simple to understand 
9b-21=0

We move all terms containing b to the left and all other terms to the right. 
+9b=0+21

We simplify left and right side of the equation. 
+9b=+21

We divide both sides of the equation by 9 to get b. 
b=2.33333333333

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