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b-1+8b=31
We simplify the equation to the form, which is simple to understand
b-1+8b=31
We move all terms containing b to the left and all other terms to the right.
+1b+8b=+31+1
We simplify left and right side of the equation.
+9b=+32
We divide both sides of the equation by 9 to get b.
b=3.5555555555556
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