$$14-\frac{b}{8} = 17$$

$$ \begin{aligned} 14-\frac{b}{8} &= 17&& \text{multiply ALL terms by } \color{blue}{ 8 }. \\[1 em]8\cdot14-8 \cdot \frac{b}{8} &= 8\cdot17&& \text{cancel out the denominators} \\[1 em]112-b &= 136&& \text{ move 112 to the right } \\[1 em]-b &= 136-112&& \\[1 em]-b &= 24&& \text{switch signs on both sides} \\[1 em]b &= -24&& \\[1 em] \end{aligned} $$

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