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42=9b-1
We simplify the equation to the form, which is simple to understand
42=9b-1
We move all terms containing b to the left and all other terms to the right.
-9b=-1-42
We simplify left and right side of the equation.
-9b=-43
We divide both sides of the equation by -09 to get b.
b=4.7777777777778
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