Solve for b
\left\{\begin{matrix}\\b=0\text{, }&\text{unconditionally}\\b\in \mathrm{R}\text{, }&-\left(±a\right)+11=0\end{matrix}\right.
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b-\frac{\left(±a\right)b}{11}=0
Subtract \frac{\left(±a\right)b}{11} from both sides.
11b-\left(±a\right)b=0
Multiply both sides of the equation by 11.
-b\left(±a\right)+11b=0
Reorder the terms.
\left(-\left(±a\right)+11\right)b=0
Combine all terms containing b.
b=0
Divide 0 by 11-\left(±a\right).
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